Authors/Thomas Aquinas/Summa Theologiae/Part I/Q76

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Iª q. 76 pr. Deinde considerandum est de unione animae ad corpus. Et circa hoc quaeruntur octo. Primo, utrum intellectivum principium uniatur corpori ut forma. Secundo, utrum intellectivum principium numero multiplicetur secundum multiplicationem corporum; vel sit unus intellectus omnium hominum. Tertio, utrum in corpore cuius forma est principium intellectivum, sit aliqua alia anima. Quarto, utrum sit in eo aliqua alia forma substantialis. Quinto, quale debeat esse corpus cuius intellectivum principium est forma. Sexto, utrum tali corpori uniatur mediante aliquo alio corpore. Septimo, utrum mediante aliquo accidente. Octavo, utrum anima sit tota in qualibet parte corporis.
Iª q. 76 a. 1 arg. 1 Ad primum sic proceditur. Videtur quod intellectivum principium non uniatur corpori ut forma. Dicit enim philosophus, in III de anima, quod intellectus est separatus, et quod nullius corporis est actus. Non ergo unitur corpori ut forma. Objection 1. It seems that the intellectual principle is not united to the body as its form. For the Philosopher says (De Anima iii, 4) that the intellect is "separate," and that it is not the act of any body. Therefore it is not united to the body as its form.
Iª q. 76 a. 1 arg. 2 Praeterea, omnis forma determinatur secundum naturam materiae cuius est forma, alioquin non requireretur proportio inter materiam et formam. Si ergo intellectus uniretur corpori ut forma, cum omne corpus habeat determinatam naturam, sequeretur quod intellectus haberet determinatam naturam. Et sic non esset omnium cognoscitivus, ut ex superioribus patet, quod est contra rationem intellectus. Non ergo intellectus unitur corpori ut forma. Objection 2. Further, every form is determined according to the nature of the matter of which it is the form; otherwise no proportion would be required between matter and form. Therefore if the intellect were united to the body as its form, since every body has a determinate nature, it would follow that the intellect has a determinate nature; and thus, it would not be capable of knowing all things, as is clear from what has been said (75, 2); which is contrary to the nature of the intellect. Therefore the intellect is not united to the body as its form.
Iª q. 76 a. 1 arg. 3 Praeterea, quaecumque potentia receptiva est actus alicuius corporis, recipit formam materialiter et individualiter, quia receptum est in recipiente secundum modum recipientis. Sed forma rei intellectae non recipitur in intellectu materialiter et individualiter, sed magis immaterialiter et universaliter, alioquin intellectus non esset cognoscitivus immaterialium et universalium, sed singularium tantum, sicut et sensus. Intellectus ergo non unitur corpori ut forma. Objection 3. Further, whatever receptive power is an act of a body, receives a form materially and individually; for what is received must be received according to the condition of the receiver. But the form of the thing understood is not received into the intellect materially and individually, but rather immaterially and universally: otherwise the intellect would not be capable of the knowledge of immaterial and universal objects, but only of individuals, like the senses. Therefore the intellect is not united to the body as its form.
Iª q. 76 a. 1 arg. 4 Praeterea, eiusdem est potentia et actio, idem enim est quod potest agere, et quod agit. Sed actio intellectualis non est alicuius corporis, ut ex superioribus patet. Ergo nec potentia intellectiva est alicuius corporis potentia. Sed virtus sive potentia non potest esse abstractior vel simplicior quam essentia a qua virtus vel potentia derivatur. Ergo nec substantia intellectus est corporis forma. Objection 4. Further, power and action have the same subject; for the same subject is what can, and does, act. But the intellectual action is not the action of a body, as appears from above (75, 2). Therefore neither is the intellectual faculty a power of the body. But virtue or power cannot be more abstract or more simple than the essence from which the faculty or power is derived. Therefore neither is the substance of the intellect the form of a body.
Iª q. 76 a. 1 arg. 5 Praeterea, id quod per se habet esse, non unitur corpori ut forma, quia forma est quo aliquid est; et sic ipsum esse formae non est ipsius formae secundum se. Sed intellectivum principium habet secundum se esse, et est subsistens, ut supra dictum est. Non ergo unitur corpori ut forma. Objection 5. Further, whatever has "per se" existence is not united to the body as its form; because a form is that by which a thing exists: so that the very existence of a form does not belong to the form by itself. But the intellectual principle has "per se" existence and is subsistent, as was said above (75, 2). Therefore it is not united to the body as its form.
Iª q. 76 a. 1 arg. 6 Praeterea, id quod inest alicui rei secundum se, semper inest ei. Sed formae secundum se inest uniri materiae, non enim per accidens aliquod, sed per essentiam suam est actus materiae; alioquin ex materia et forma non fieret unum substantialiter, sed accidentaliter. Forma ergo non potest esse sine propria materia. Sed intellectivum principium, cum sit incorruptibile, ut supra ostensum est, remanet corpori non unitum, corpore corrupto. Ergo intellectivum principium non unitur corpori ut forma. Objection 6. Further, whatever exists in a thing by reason of its nature exists in it always. But to be united to matter belongs to the form by reason of its nature; because form is the act of matter, not by an accidental quality, but by its own essence; otherwise matter and form would not make a thing substantially one, but only accidentally one. Therefore a form cannot be without its own proper matter. But the intellectual principle, since it is incorruptible, as was shown above (75, 6), remains separate from the body, after the dissolution of the body. Therefore the intellectual principle is not united to the body as its form.
Iª q. 76 a. 1 s. c. Sed contra, secundum philosophum, in VIII Metaphys., differentia sumitur a forma rei. Sed differentia constitutiva hominis est rationale; quod dicitur de homine ratione intellectivi principii. Intellectivum ergo principium est forma hominis. On the contrary, According to the Philosopher, Metaph. viii (Did. vii 2), difference is derived from the form. But the difference which constitutes man is "rational," which is applied to man on account of his intellectual principle. Therefore the intellectual principle is the form of man.
Iª q. 76 a. 1 co. Respondeo dicendum quod necesse est dicere quod intellectus, qui est intellectualis operationis principium, sit humani corporis forma. Illud enim quo primo aliquid operatur, est forma eius cui operatio attribuitur, sicut quo primo sanatur corpus, est sanitas, et quo primo scit anima, est scientia; unde sanitas est forma corporis, et scientia animae. Et huius ratio est, quia nihil agit nisi secundum quod est actu, unde quo aliquid est actu, eo agit. Manifestum est autem quod primum quo corpus vivit, est anima. Et cum vita manifestetur secundum diversas operationes in diversis gradibus viventium, id quo primo operamur unumquodque horum operum vitae, est anima, anima enim est primum quo nutrimur, et sentimus, et movemur secundum locum; et similiter quo primo intelligimus. Hoc ergo principium quo primo intelligimus, sive dicatur intellectus sive anima intellectiva, est forma corporis. Et haec est demonstratio Aristotelis in II de anima. Si quis autem velit dicere animam intellectivam non esse corporis formam, oportet quod inveniat modum quo ista actio quae est intelligere, sit huius hominis actio, experitur enim unusquisque seipsum esse qui intelligit. Attribuitur autem aliqua actio alicui tripliciter, ut patet per philosophum, V Physic., dicitur enim movere aliquid aut agere vel secundum se totum, sicut medicus sanat; aut secundum partem, sicut homo videt per oculum; aut per accidens, sicut dicitur quod album aedificat, quia accidit aedificatori esse album. Cum igitur dicimus Socratem aut Platonem intelligere, manifestum est quod non attribuitur ei per accidens, attribuitur enim ei inquantum est homo, quod essentialiter praedicatur de ipso. Aut ergo oportet dicere quod Socrates intelligit secundum se totum, sicut Plato posuit, dicens hominem esse animam intellectivam, aut oportet dicere quod intellectus sit aliqua pars Socratis. Et primum quidem stare non potest, ut supra ostensum est, propter hoc quod ipse idem homo est qui percipit se et intelligere et sentire, sentire autem non est sine corpore, unde oportet corpus aliquam esse hominis partem. Relinquitur ergo quod intellectus quo Socrates intelligit, est aliqua pars Socratis ita quod intellectus aliquo modo corpori Socratis uniatur. Hanc autem unionem Commentator, in III de anima, dicit esse per speciem intelligibilem. Quae quidem habet duplex subiectum, unum scilicet intellectum possibilem; et aliud ipsa phantasmata quae sunt in organis corporeis. Et sic per speciem intelligibilem continuatur intellectus possibilis corpori huius vel illius hominis. Sed ista continuatio vel unio non sufficit ad hoc quod actio intellectus sit actio Socratis. Et hoc patet per similitudinem in sensu, ex quo Aristoteles procedit ad considerandum ea quae sunt intellectus. Sic enim se habent phantasmata ad intellectum, ut dicitur in III de anima, sicut colores ad visum. Sicut ergo species colorum sunt in visu, ita species phantasmatum sunt in intellectu possibili. Patet autem quod ex hoc quod colores sunt in pariete, quorum similitudines sunt in visu, actio visus non attribuitur parieti, non enim dicimus quod paries videat, sed magis quod videatur. Ex hoc ergo quod species phantasmatum sunt in intellectu possibili, non sequitur quod Socrates, in quo sunt phantasmata, intelligat; sed quod ipse, vel eius phantasmata intelligantur. Quidam autem dicere voluerunt quod intellectus unitur corpori ut motor; et sic ex intellectu et corpore fit unum, ut actio intellectus toti attribui possit. Sed hoc est multipliciter vanum. Primo quidem, quia intellectus non movet corpus nisi per appetitum, cuius motus praesupponit operationem intellectus. Non ergo quia movetur Socrates ab intellectu, ideo intelligit, sed potius e converso, quia intelligit, ideo ab intellectu movetur Socrates. Secundo quia, cum Socrates sit quoddam individuum in natura cuius essentia est una, composita ex materia et forma; si intellectus non sit forma eius, sequitur quod sit praeter essentiam eius; et sic intellectus comparabitur ad totum Socratem sicut motor ad motum. Intelligere autem est actio quiescens in agente, non autem transiens in alterum, sicut calefactio. Non ergo intelligere potest attribui Socrati propter hoc quod est motus ab intellectu. Tertio, quia actio motoris nunquam attribuitur moto nisi sicut instrumento, sicut actio carpentarii serrae. Si igitur intelligere attribuitur Socrati quia est actio motoris eius, sequitur quod attribuatur ei sicut instrumento. Quod est contra philosophum, qui vult quod intelligere non sit per instrumentum corporeum. Quarto quia, licet actio partis attribuatur toti, ut actio oculi homini; nunquam tamen attribuitur alii parti, nisi forte per accidens, non enim dicimus quod manus videat, propter hoc quod oculus videt. Si ergo ex intellectu et Socrate dicto modo fit unum, actio intellectus non potest attribui Socrati. Si vero Socrates est totum quod componitur ex unione intellectus ad reliqua quae sunt Socratis, et tamen intellectus non unitur aliis quae sunt Socratis nisi sicut motor; sequitur quod Socrates non sit unum simpliciter, et per consequens nec ens simpliciter; sic enim aliquid est ens, quomodo et unum. Relinquitur ergo solus modus quem Aristoteles ponit, quod hic homo intelligit, quia principium intellectivum est forma ipsius. Sic ergo ex ipsa operatione intellectus apparet quod intellectivum principium unitur corpori ut forma. Potest etiam idem manifestari ex ratione speciei humanae. Natura enim uniuscuiusque rei ex eius operatione ostenditur. Propria autem operatio hominis, inquantum est homo, est intelligere, per hanc enim omnia animalia transcendit. Unde et Aristoteles, in libro Ethic., in hac operatione, sicut in propria hominis, ultimam felicitatem constituit. Oportet ergo quod homo secundum illud speciem sortiatur, quod est huius operationis principium. Sortitur autem unumquodque speciem per propriam formam. Relinquitur ergo quod intellectivum principium sit propria hominis forma. Sed considerandum est quod, quanto forma est nobilior, tanto magis dominatur materiae corporali, et minus ei immergitur, et magis sua operatione vel virtute excedit eam. Unde videmus quod forma mixti corporis habet aliquam operationem quae non causatur ex qualitatibus elementaribus. Et quanto magis proceditur in nobilitate formarum, tanto magis invenitur virtus formae materiam elementarem excedere, sicut anima vegetabilis plus quam forma metalli, et anima sensibilis plus quam anima vegetabilis. Anima autem humana est ultima in nobilitate formarum. Unde intantum sua virtute excedit materiam corporalem, quod habet aliquam operationem et virtutem in qua nullo modo communicat materia corporalis. Et haec virtus dicitur intellectus. Est autem attendendum quod, si quis poneret animam componi ex materia et forma, nullo modo posset dicere animam esse formam corporis. Cum enim forma sit actus, materia vero sit ens in potentia tantum; nullo modo id quod est ex materia et forma compositum, potest esse alterius forma secundum se totum. Si autem secundum aliquid sui sit forma, id quod est forma dicimus animam, et id cuius est forma dicimus primum animatum, ut supra dictum est. I answer that, We must assert that the intellect which is the principle of intellectual operation is the form of the human body. For that whereby primarily anything acts is a form of the thing to which the act is to be attributed: for instance, that whereby a body is primarily healed is health, and that whereby the soul knows primarily is knowledge; hence health is a form of the body, and knowledge is a form of the soul. The reason is because nothing acts except so far as it is in act; wherefore a thing acts by that whereby it is in act. Now it is clear that the first thing by which the body lives is the soul. And as life appears through various operations in different degrees of living things, that whereby we primarily perform each of all these vital actions is the soul. For the soul is the primary principle of our nourishment, sensation, and local movement; and likewise of our understanding. Therefore this principle by which we primarily understand, whether it be called the intellect or the intellectual soul, is the form of the body. This is the demonstration used by Aristotle (De Anima ii, 2). But if anyone says that the intellectual soul is not the form of the body he must first explain how it is that this action of understanding is the action of this particular man; for each one is conscious that it is himself who understands. Now an action may be attributed to anyone in three ways, as is clear from the Philosopher (Phys. v, 1); for a thing is said to move or act, either by virtue of its whole self, for instance, as a physician heals; or by virtue of a part, as a man sees by his eye; or through an accidental quality, as when we say that something that is white builds, because it is accidental to the builder to be white. So when we say that Socrates or Plato understands, it is clear that this is not attributed to him accidentally; since it is ascribed to him as man, which is predicated of him essentially. We must therefore say either that Socrates understands by virtue of his whole self, as Plato maintained, holding that man is an intellectual soul; or that intelligence is a part of Socrates. The first cannot stand, as was shown above (75, 4), for this reason, that it is one and the same man who is conscious both that he understands, and that he senses. But one cannot sense without a body: therefore the body must be some part of man. It follows therefore that the intellect by which Socrates understands is a part of Socrates, so that in some way it is united to the body of Socrates. The Commentator held that this union is through the intelligible species, as having a double subject, in the possible intellect, and in the phantasms which are in the corporeal organs. Thus through the intelligible species the possible intellect is linked to the body of this or that particular man. But this link or union does not sufficiently explain the fact, that the act of the intellect is the act of Socrates. This can be clearly seen from comparison with the sensitive faculty, from which Aristotle proceeds to consider things relating to the intellect. For the relation of phantasms to the intellect is like the relation of colors to the sense of sight, as he says De Anima iii, 5,7. Therefore, as the species of colors are in the sight, so are the species of phantasms in the possible intellect. Now it is clear that because the colors, the images of which are in the sight, are on a wall, the action of seeing is not attributed to the wall: for we do not say that the wall sees, but rather that it is seen. Therefore, from the fact that the species of phantasms are in the possible intellect, it does not follow that Socrates, in whom are the phantasms, understands, but that he or his phantasms are understood. Some, however, tried to maintain that the intellect is united to the body as its motor; and hence that the intellect and body form one thing so that the act of the intellect could be attributed to the whole. This is, however, absurd for many reasons. First, because the intellect does not move the body except through the appetite, the movement of which presupposes the operation of the intellect. The reason therefore why Socrates understands is not because he is moved by his intellect, but rather, contrariwise, he is moved by his intellect because he understands. Secondly, because since Socrates is an individual in a nature of one essence composed of matter and form, if the intellect be not the form, it follows that it must be outside the essence, and then the intellect is the whole Socrates as a motor to the thing moved. Whereas the act of intellect remains in the agent, and does not pass into something else, as does the action of heating. Therefore the action of understanding cannot be attributed to Socrates for the reason that he is moved by his intellect. Thirdly, because the action of a motor is never attributed to the thing moved, except as to an instrument; as the action of a carpenter to a saw. Therefore if understanding is attributed to Socrates, as the action of what moves him, it follows that it is attributed to him as to an instrument. This is contrary to the teaching of the Philosopher, who holds that understanding is not possible through a corporeal instrument (De Anima iii, 4). Fourthly, because, although the action of a part be attributed to the whole, as the action of the eye is attributed to a man; yet it is never attributed to another part, except perhaps indirectly; for we do not say that the hand sees because the eye sees. Therefore if the intellect and Socrates are united in the above manner, the action of the intellect cannot be attributed to Socrates. If, however, Socrates be a whole composed of a union of the intellect with whatever else belongs to Socrates, and still the intellect be united to those other things only as a motor, it follows that Socrates is not one absolutely, and consequently neither a being absolutely, for a thing is a being according as it is one. There remains, therefore, no other explanation than that given by Aristotle--namely, that this particular man understands, because the intellectual principle is his form. Thus from the very operation of the intellect it is made clear that the intellectual principle is united to the body as its form. The same can be clearly shown from the nature of the human species. For the nature of each thing is shown by its operation. Now the proper operation of man as man is to understand; because he thereby surpasses all other animals. Whence Aristotle concludes (Ethic. x, 7) that the ultimate happiness of man must consist in this operation as properly belonging to him. Man must therefore derive his species from that which is the principle of this operation. But the species of anything is derived from its form. It follows therefore that the intellectual principle is the proper form of man. But we must observe that the nobler a form is, the more it rises above corporeal matter, the less it is merged in matter, and the more it excels matter by its power and its operation; hence we find that the form of a mixed body has another operation not caused by its elemental qualities. And the higher we advance in the nobility of forms, the more we find that the power of the form excels the elementary matter; as the vegetative soul excels the form of the metal, and the sensitive soul excels the vegetative soul. Now the human soul is the highest and noblest of forms. Wherefore it excels corporeal matter in its power by the fact that it has an operation and a power in which corporeal matter has no share whatever. This power is called the intellect. It is well to remark that if anyone holds that the soul is composed of matter and form, it would follow that in no way could the soul be the form of the body. For since the form is an act, and matter is only in potentiality, that which is composed of matter and form cannot be the form of another by virtue of itself as a whole. But if it is a form by virtue of some part of itself, then that part which is the form we call the soul, and that of which it is the form we call the "primary animate," as was said above (75, 5).
Iª q. 76 a. 1 ad 1 Ad primum ergo dicendum quod, sicut philosophus dicit in II Physic., ultima formarum naturalium, ad quam terminatur consideratio philosophi naturalis, scilicet anima humana, est quidem separata, sed tamen in materia; quod ex hoc probat, quia homo ex materia generat hominem, et sol. Separata quidem est secundum virtutem intellectivam, quia virtus intellectiva non est virtus alicuius organi corporalis, sicut virtus visiva est actus oculi intelligere enim est actus qui non potest exerceri per organum corporale, sicut exercetur visio. Sed in materia est inquantum ipsa anima cuius est haec virtus, est corporis forma, et terminus generationis humanae. Sic ergo philosophus dicit in III de anima quod intellectus est separatus, quia non est virtus alicuius organi corporalis. Reply to Objection 1. As the Philosopher says (Phys. ii, 2), the ultimate natural form to which the consideration of the natural philosopher is directed is indeed separate; yet it exists in matter. He proves this from the fact that "man and the sun generate man from matter." It is separate indeed according to its intellectual power, because the intellectual power does not belong to a corporeal organ, as the power of seeing is the act of the eye; for understanding is an act which cannot be performed by a corporeal organ, like the act of seeing. But it exists in matter so far as the soul itself, to which this power belongs, is the form of the body, and the term of human generation. And so the Philosopher says (De Anima iii) that the intellect is separate, because it is not the faculty of a corporeal organ.
Iª q. 76 a. 1 ad 2 Et per hoc patet responsio ad secundum et tertium. Sufficit enim ad hoc quod homo possit intelligere omnia per intellectum, et ad hoc quod intellectus intelligat immaterialia et universalia, quod virtus intellectiva non est corporis actus. From this it is clear how to answer the Second and Third objections: since, in order that man may be able to understand all things by means of his intellect, and that his intellect may understand immaterial things and universals, it is sufficient that the intellectual power be not the act of the body.
Iª q. 76 a. 1 ad 4 Ad quartum dicendum quod humana anima non est forma in materia corporali immersa, vel ab ea totaliter comprehensa, propter suam perfectionem. Et ideo nihil prohibet aliquam eius virtutem non esse corporis actum; quamvis anima secundum suam essentiam sit corporis forma. Reply to Objection 4. The human soul, by reason of its perfection, is not a form merged in matter, or entirely embraced by matter. Therefore there is nothing to prevent some power thereof not being the act of the body, although the soul is essentially the form of the body.
Iª q. 76 a. 1 ad 5 Ad quintum dicendum quod anima illud esse in quo ipsa subsistit, communicat materiae corporali, ex qua et anima intellectiva fit unum, ita quod illud esse quod est totius compositi, est etiam ipsius animae. Quod non accidit in aliis formis, quae non sunt subsistentes. Et propter hoc anima humana remanet in suo esse, destructo corpore, non autem aliae formae. Reply to Objection 5. The soul communicates that existence in which it subsists to the corporeal matter, out of which and the intellectual soul there results unity of existence; so that the existence of the whole composite is also the existence of the soul. This is not the case with other non-subsistent forms. For this reason the human soul retains its own existence after the dissolution of the body; whereas it is not so with other forms.
Iª q. 76 a. 1 ad 6 Ad sextum dicendum quod secundum se convenit animae corpori uniri, sicut secundum se convenit corpori levi esse sursum. Et sicut corpus leve manet quidem leve cum a loco proprio fuerit separatum, cum aptitudine tamen et inclinatione ad proprium locum; ita anima humana manet in suo esse cum fuerit a corpore separata, habens aptitudinem et inclinationem naturalem ad corporis unionem. Reply to Objection 6. To be united to the body belongs to the soul by reason of itself, as it belongs to a light body by reason of itself to be raised up. And as a light body remains light, when removed from its proper place, retaining meanwhile an aptitude and an inclination for its proper place; so the human soul retains its proper existence when separated from the body, having an aptitude and a natural inclination to be united to the body.
Iª q. 76 a. 2 arg. 1 Ad secundum sic proceditur. Videtur quod intellectivum principium non multiplicetur secundum multiplicationem corporum, sed sit unus intellectus in omnibus hominibus. Nulla enim substantia immaterialis multiplicatur secundum numerum in una specie. Anima autem humana est substantia immaterialis, non enim est composita ex materia et forma, ut supra ostensum est. Non ergo sunt multae in una specie. Sed omnes homines sunt unius speciei. Est ergo unus intellectus omnium hominum. Objection 1. It would seem that the intellectual principle is not multiplied according to the number of bodies, but that there is one intellect in all men. For an immaterial substance is not multiplied in number within one species. But the human soul is an immaterial substance; since it is not composed of matter and form as was shown above (75, 5). Therefore there are not many human souls in one species. But all men are of one species. Therefore there is but one intellect in all men.
Iª q. 76 a. 2 arg. 2 Praeterea, remota causa, removetur effectus. Si ergo secundum multiplicationem corporum multiplicarentur animae humanae, consequens videretur quod, remotis corporibus, multitudo animarum non remaneret, sed ex omnibus animabus remaneret aliquod unum solum. Quod est haereticum, periret enim differentia praemiorum et poenarum. Objection 2. Further, when the cause is removed, the effect is also removed. Therefore, if human souls were multiplied according to the number of bodies, it follows that the bodies being removed, the number of souls would not remain; but from all the souls there would be but a single remainder. This is heretical; for it would do away with the distinction of rewards and punishments.
Iª q. 76 a. 2 arg. 3 Praeterea, si intellectus meus est alius ab intellectu tuo, intellectus meus est quoddam individuum, et similiter intellectus tuus, particularia enim sunt quae differunt numero et conveniunt in una specie. Sed omne quod recipitur in aliquo, est in eo per modum recipientis. Ergo species rerum in intellectu meo et tuo reciperentur individualiter, quod est contra rationem intellectus, qui est cognoscitivus universalium. Objection 3. Further, if my intellect is distinct from your intellect, my intellect is an individual, and so is yours; for individuals are things which differ in number but agree in one species. Now whatever is received into anything must be received according to the condition of the receiver. Therefore the species of things would be received individually into my intellect, and also into yours: which is contrary to the nature of the intellect which knows universals.
Iª q. 76 a. 2 arg. 4 Praeterea, intellectum est in intellectu intelligente. Si ergo intellectus meus est alius ab intellectu tuo, oportet quod aliud sit intellectum a me, et aliud sit intellectum a te. Et ita erit individualiter numeratum, et intellectum in potentia tantum, et oportebit abstrahere intentionem communem ab utroque, quia a quibuslibet diversis contingit abstrahere aliquod commune intelligibile. Quod est contra rationem intellectus, quia sic non videretur distingui intellectus a virtute imaginativa. Videtur ergo relinqui quod sit unus intellectus omnium hominum. Objection 4. Further, the thing understood is in the intellect which understands. If, therefore, my intellect is distinct from yours, what is understood by me must be distinct from what is understood by you; and consequently it will be reckoned as something individual, and be only potentially something understood; so that the common intention will have to be abstracted from both; since from things diverse something intelligible common to them may be abstracted. But this is contrary to the nature of the intellect; for then the intellect would seem not to be distinct from the imagination. It seems, therefore, to follow that there is one intellect in all men.
Iª q. 76 a. 2 arg. 5 Praeterea, cum discipulus accipit scientiam a magistro, non potest dici quod scientia magistri generet scientiam in discipulo, quia sic etiam scientia esset forma activa, sicut calor; quod patet esse falsum. Videtur ergo quod eadem numero scientia quae est in magistro, communicetur discipulo. Quod esse non potest, nisi sit unus intellectus utriusque. Videtur ergo quod sit unus intellectus discipuli et magistri; et per consequens omnium hominum. Objection 5. Further, when the disciple receives knowledge from the master, it cannot be said that the master's knowledge begets knowledge in the disciple, because then also knowledge would be an active form, such as heat is, which is clearly false. It seems, therefore, that the same individual knowledge which is in the master is communicated to the disciple; which cannot be, unless there is one intellect in both. Seemingly, therefore, the intellect of the disciple and master is but one; and, consequently, the same applies to all men.
Iª q. 76 a. 2 arg. 6 Praeterea, Augustinus dicit, in libro de quantitate animae, si plures tantum animas humanas dixerim, ipse me ridebo. Sed maxime videtur anima esse una quantum ad intellectum. Ergo est unus intellectus omnium hominum. Objection 6. Further, Augustine (De Quant. Animae xxxii) says: "If I were to say that there are many human souls, I should laugh at myself." But the soul seems to be one chiefly on account of the intellect. Therefore there is one intellect of all men.
Iª q. 76 a. 2 s. c. Sed contra est quod philosophus dicit, in II Physic., quod sicut se habent causae universales ad universalia, ita se habent causae particulares ad particularia. Sed impossibile est quod una anima secundum speciem, sit diversorum animalium secundum speciem. Ergo impossibile est quod anima intellectiva una numero, sit diversorum secundum numerum. On the contrary, The Philosopher says (Phys. ii, 3) that the relation of universal causes to universals is like the relation of particular causes to individuals. But it is impossible that a soul, one in species, should belong to animals of different species. Therefore it is impossible that one individual intellectual soul should belong to several individuals.
Iª q. 76 a. 2 co. Respondeo dicendum quod intellectum esse unum omnium hominum, omnino est impossibile. Et hoc quidem patet, si, secundum Platonis sententiam homo sit ipse intellectus. Sequeretur enim, si Socratis et Platonis est unus intellectus tantum, quod Socrates et Plato sint unus homo; et quod non distinguantur ab invicem nisi per hoc quod est extra essentiam utriusque. Et erit tunc distinctio Socratis et Platonis non alia quam hominis tunicati et cappati, quod est omnino absurdum. Similiter etiam patet hoc esse impossibile, si, secundum sententiam Aristotelis, intellectus ponatur pars, seu potentia, animae quae est hominis forma. Impossibile est enim plurium numero diversorum esse unam formam, sicut impossibile est quod eorum sit unum esse, nam forma est essendi principium. Similiter etiam patet hoc esse impossibile quocumque modo quis ponat unionem intellectus ad hunc et ad illum hominem. Manifestum est enim quod, si sit unum principale agens et duo instrumenta, dici poterit unum agens simpliciter, sed plures actiones, sicut si unus homo tangat diversa duabus manibus, erit unus tangens, sed duo tactus. Si vero e converso instrumentum sit unum et principales agentes diversi, dicentur quidem plures agentes, sed una actio, sicut si multi uno fune trahant navem, erunt multi trahentes, sed unus tractus. Si vero agens principale sit unum et instrumentum unum, dicetur unum agens et una actio, sicut cum faber uno martello percutit, est unus percutiens et una percussio. Manifestum est autem quod, qualitercumque intellectus seu uniatur seu copuletur huic vel illi homini, intellectus inter cetera quae ad hominem pertinent, principalitatem habet, obediunt enim vires sensitivae intellectui, et ei deserviunt. Si ergo poneretur quod essent plures intellectus et sensus unus duorum hominum, puta si duo homines haberent unum oculum; essent quidem plures videntes, sed una visio. Si vero intellectus est unus, quantumcumque diversificentur alia quibus omnibus intellectus utitur quasi instrumentis, nullo modo Socrates et Plato poterunt dici nisi unus intelligens. Et si addamus quod ipsum intelligere, quod est actio intellectus, non fit per aliquod aliud organum, nisi per ipsum intellectum; sequetur ulterius quod sit et agens unum et actio una; idest quod omnes homines sint unus intelligens, et unum intelligere; dico autem respectu eiusdem intelligibilis. Posset autem diversificari actio intellectualis mea et tua per diversitatem phantasmatum, quia scilicet aliud est phantasma lapidis in me et aliud in te, si ipsum phantasma, secundum quod est aliud in me et aliud in te, esset forma intellectus possibilis, quia idem agens secundum diversas formas producit diversas actiones, sicut secundum diversas formas rerum respectu eiusdem oculi sunt diversae visiones. Sed ipsum phantasma non est forma intellectus possibilis, sed species intelligibilis quae a phantasmatibus abstrahitur. In uno autem intellectu a phantasmatibus diversis eiusdem speciei non abstrahitur nisi una species intelligibilis. Sicut in uno homine apparet, in quo possunt esse diversa phantasmata lapidis, et tamen ab omnibus eis abstrahitur una species intelligibilis lapidis, per quam intellectus unius hominis operatione una intelligit naturam lapidis, non obstante diversitate phantasmatum. Si ergo unus intellectus esset omnium hominum, diversitas phantasmatum quae sunt in hoc et in illo, non posset causare diversitatem intellectualis operationis huius et illius hominis, ut Commentator fingit in III de anima. Relinquitur ergo quod omnino impossibile et inconveniens est ponere unum intellectum omnium hominum. I answer that, It is absolutely impossible for one intellect to belong to all men. This is clear if, as Plato maintained, man is the intellect itself. For it would follow that Socrates and Plato are one man; and that they are not distinct from each other, except by something outside the essence of each. The distinction between Socrates and Plato would be no other than that of one man with a tunic and another with a cloak; which is quite absurd. It is likewise clear that this is impossible if, according to the opinion of Aristotle (De Anima ii, 2), it is supposed that the intellect is a part or a power of the soul which is the form of man. For it is impossible for many distinct individuals to have one form, as it is impossible for them to have one existence, for the form is the principle of existence. Again, this is clearly impossible, whatever one may hold as to the manner of the union of the intellect to this or that man. For it is manifest that, supposing there is one principal agent, and two instruments, we can say that there is one agent absolutely, but several actions; as when one man touches several things with his two hands, there will be one who touches, but two contacts. If, on the contrary, we suppose one instrument and several principal agents, we might say that there are several agents, but one act; for example, if there be many drawing a ship by means of a rope; there will be many drawing, but one pull. If, however, there is one principal agent, and one instrument, we say that there is one agent and one action, as when the smith strikes with one hammer, there is one striker and one stroke. Now it is clear that no matter how the intellect is united or coupled to this or that man, the intellect has the precedence of all the other things which appertain to man; for the sensitive powers obey the intellect, and are at its service. Therefore, if we suppose two men to have several intellects and one sense--for instance, if two men had one eye--there would be several seers, but one sight. But if there is one intellect, no matter how diverse may be all those things of which the intellect makes use as instruments, in no way is it possible to say that Socrates and Plato are otherwise than one understanding man. And if to this we add that to understand, which is the act of the intellect, is not affected by any organ other than the intellect itself; it will further follow that there is but one agent and one action: that is to say that all men are but one "understander," and have but one act of understanding, in regard, that is, of one intelligible object. However, it would be possible to distinguish my intellectual action form yours by the distinction of the phantasms--that is to say, were there one phantasm of a stone in me, and another in you--if the phantasm itself, as it is one thing in me and another in you, were a form of the possible intellect; since the same agent according to divers forms produces divers actions; as, according to divers forms of things with regard to the same eye, there are divers visions. But the phantasm itself is not a form of the possible intellect; it is the intelligible species abstracted from the phantasm that is a form. Now in one intellect, from different phantasms of the same species, only one intelligible species is abstracted; as appears in one man, in whom there may be different phantasms of a stone; yet from all of them only one intelligible species of a stone is abstracted; by which the intellect of that one man, by one operation, understands the nature of a stone, notwithstanding the diversity of phantasms. Therefore, if there were one intellect for all men, the diversity of phantasms which are in this one and that one would not cause a diversity of intellectual operation in this man and that man. It follows, therefore, that it is altogether impossible and unreasonable to maintain that there exists one intellect for all men.
Iª q. 76 a. 2 ad 1 Ad primum ergo dicendum quod, licet anima intellectiva non habeat materiam ex qua sit, sicut nec Angelus, tamen est forma materiae alicuius; quod Angelo non convenit. Et ideo secundum divisionem materiae sunt multae animae unius speciei, multi autem Angeli unius speciei omnino esse non possunt. Reply to Objection 1. Although the intellectual soul, like an angel, has no matter from which it is produced, yet it is the form of a certain matter; in which it is unlike an angel. Therefore, according to the division of matter, there are many souls of one species; while it is quite impossible for many angels to be of one species.
Iª q. 76 a. 2 ad 2 Ad secundum dicendum quod unumquodque hoc modo habet unitatem, quo habet esse, et per consequens idem est iudicium de multiplicatione rei, et de esse ipsius. Manifestum est autem quod anima intellectualis, secundum suum esse, unitur corpori ut forma; et tamen, destructo corpore, remanet anima intellectualis in suo esse. Et eadem ratione multitudo animarum est secundum multitudinem corporum; et tamen, destructis corporibus, remanent animae in suo esse multiplicatae. Reply to Objection 2. Everything has unity in the same way that it has being; consequently we must judge of the multiplicity of a thing as we judge of its being. Now it is clear that the intellectual soul, by virtue of its very being, is united to the body as its form; yet, after the dissolution of the body, the intellectual soul retains its own being. In like manner the multiplicity of souls is in proportion to the multiplicity of the bodies; yet, after the dissolution of the bodies, the souls retain their multiplied being.
Iª q. 76 a. 2 ad 3 Ad tertium dicendum quod individuatio intelligentis, aut speciei per quam intelligit, non excludit intelligentiam universalium, alioquin, cum intellectus separati sint quaedam substantiae subsistentes, et per consequens particulares, non possent universalia intelligere. Sed materialitas cognoscentis et speciei per quam cognoscitur, universalis cognitionem impedit. Sicut enim omnis actio est secundum modum formae qua agens agit, ut calefactio secundum modum caloris; ita cognitio est secundum modum speciei qua cognoscens cognoscit. Manifestum est autem quod natura communis distinguitur et multiplicatur secundum principia individuantia, quae sunt ex parte materiae. Si ergo forma per quam fit cognitio, sit materialis, non abstracta a conditionibus materiae, erit similitudo naturae speciei aut generis, secundum quod est distincta et multiplicata per principia individuantia, et ita non poterit cognosci natura rei in sua communitate. Si vero species sit abstracta a conditionibus materiae individualis, erit similitudo naturae absque iis quae ipsam distinguunt et multiplicant, et ita cognoscetur universale. Nec refert, quantum ad hoc, utrum sit unus intellectus vel plures, quia si etiam esset unus tantum, oporteret ipsum esse aliquem quendam, et speciem per quam intelligit esse aliquam quandam. Reply to Objection 3. Individuality of the intelligent being, or of the species whereby it understands, does not exclude the understanding of universals; otherwise, since separate intellects are subsistent substances, and consequently individual, they could not understand universals. But the materiality of the knower, and of the species whereby it knows, impedes the knowledge of the universal. For as every action is according to the mode of the form by which the agent acts, as heating is according to the mode of the heat; so knowledge is according to the mode of the species by which the knower knows. Now it is clear that common nature becomes distinct and multiplied by reason of the individuating principles which come from the matter. Therefore if the form, which is the means of knowledge, is material--that is, not abstracted from material conditions--its likeness to the nature of a species or genus will be according to the distinction and multiplication of that nature by means of individuating principles; so that knowledge of the nature of a thing in general will be impossible. But if the species be abstracted from the conditions of individual matter, there will be a likeness of the nature without those things which make it distinct and multiplied; thus there will be knowledge of the universal. Nor does it matter, as to this particular point, whether there be one intellect or many; because, even if there were but one, it would necessarily be an individual intellect, and the species whereby it understands, an individual species.
Iª q. 76 a. 2 ad 4 Ad quartum dicendum quod, sive intellectus sit unus sive plures, id quod intelligitur est unum. Id enim quod intelligitur non est in intellectu secundum se, sed secundum suam similitudinem, lapis enim non est in anima, sed species lapidis, ut dicitur in III de anima. Et tamen lapis est id quod intelligitur, non autem species lapidis, nisi per reflexionem intellectus supra seipsum, alioquin scientiae non essent de rebus, sed de speciebus intelligibilibus. Contingit autem eidem rei diversa secundum diversas formas assimilari. Et quia cognitio fit secundum assimilationem cognoscentis ad rem cognitam, sequitur quod idem a diversis cognoscentibus cognosci contingit, ut patet in sensu, nam plures vident eundem colorem, secundum diversas similitudines. Et similiter plures intellectus intelligunt unam rem intellectam. Sed hoc tantum interest inter sensum et intellectum, secundum sententiam Aristotelis, quod res sentitur secundum illam dispositionem quam extra animam habet, in sua particularitate, natura autem rei quae intelligitur, est quidem extra animam, sed non habet illum modum essendi extra animam, secundum quem intelligitur. Intelligitur enim natura communis seclusis principiis individuantibus; non autem hunc modum essendi habet extra animam. Sed secundum sententiam Platonis, res intellecta eo modo est extra animam quo intelligitur, posuit enim naturas rerum a materia separatas. Reply to Objection 4. Whether the intellect be one or many, what is understood is one; for what is understood is in the intellect, not according to its own nature, but according to its likeness; for "the stone is not in the soul, but its likeness is," as is said, De Anima iii, 8. Yet it is the stone which is understood, not the likeness of the stone; except by a reflection of the intellect on itself: otherwise, the objects of sciences would not be things, but only intelligible species. Now it happens that different things, according to different forms, are likened to the same thing. And since knowledge is begotten according to the assimilation of the knower to the thing known, it follows that the same thing may happen to be known by several knowers; as is apparent in regard to the senses; for several see the same color, according to different likenesses. In the same way several intellects understand one object understood. But there is this difference, according to the opinion of Aristotle, between the sense and the intelligence--that a thing is perceived by the sense according to the disposition which it has outside the soul --that is, in its individuality; whereas the nature of the thing understood is indeed outside the soul, but the mode according to which it exists outside the soul is not the mode according to which it is understood. For the common nature is understood as apart from the individuating principles; whereas such is not its mode of existence outside the soul. But, according to the opinion of Plato, the thing understood exists outside the soul in the same condition as those under which it is understood; for he supposed that the natures of things exist separate from matter.
Iª q. 76 a. 2 ad 5 Ad quintum dicendum quod scientia alia est in discipulo, et alia in magistro. Quomodo autem causetur, in sequentibus ostendetur. Reply to Objection 5. One knowledge exists in the disciple and another in the master. How it is caused will be shown later on (117, 1).
Iª q. 76 a. 2 ad 6 Ad sextum dicendum quod Augustinus intelligit animas non esse plures tantum, quin uniantur in una ratione speciei. Reply to Objection 6. Augustine denies a plurality of souls, that would involve a plurality of species.
Iª q. 76 a. 3 arg. 1 Ad tertium sic proceditur. Videtur quod praeter animam intellectivam sint in homine aliae animae per essentiam differentes, scilicet sensitiva et nutritiva. Corruptibile enim et incorruptibile non sunt unius substantiae. Sed anima intellectiva est incorruptibilis; aliae vero animae, scilicet sensitiva et nutritiva, sunt corruptibiles, ut ex superioribus patet. Ergo in homine non potest esse una essentia animae intellectivae et sensitivae et nutritivae. Objection 1. It would seem that besides the intellectual soul there are in man other souls essentially different from one another, such as the sensitive soul and the nutritive soul. For corruptible and incorruptible are not of the same substance. But the intellectual soul is incorruptible; whereas the other souls, as the sensitive and the nutritive, are corruptible, as was shown above (75, 6). Therefore in man the essence of the intellectual soul, the sensitive soul, and the nutritive soul, cannot be the same.
Iª q. 76 a. 3 arg. 2 Si dicatur quod anima sensitiva in homine est incorruptibilis, contra, corruptibile et incorruptibile differunt secundum genus, ut dicitur in X Metaphys. Sed anima sensitiva in equo et leone et aliis brutis animalibus est corruptibilis. Si igitur in homine sit incorruptibilis, non erit eiusdem generis anima sensitiva in homine et bruto. Animal autem dicitur ex eo quod habet animam sensitivam. Neque ergo animal erit unum genus commune hominis et aliorum animalium. Quod est inconveniens. Objection 2. Further, if it be said that the sensitive soul in man is incorruptible; on the contrary, "corruptible and incorruptible differ generically," says the Philosopher, Metaph. x (Did. ix, 10). But the sensitive soul in the horse, the lion, and other brute animals, is corruptible. If, therefore, in man it be incorruptible, the sensitive soul in man and brute animals will not be of the same "genus." Now an animal is so called from its having a sensitive soul; and, therefore, "animal" will not be one genus common to man and other animals, which is absurd.
Iª q. 76 a. 3 arg. 3 Praeterea, philosophus dicit, in libro de Generat. Animal., quod embryo prius est animal quam homo. Sed hoc esse non posset, si esset eadem essentia animae sensitivae et intellectivae, est enim animal per animam sensitivam, homo vero per animam intellectivam. Non ergo in homine est una essentia animae sensitivae et intellectivae. Objection 3. Further, the Philosopher says, Metaph. viii (Did. vii, 2), that the genus is taken from the matter, and difference from the form. But "rational," which is the difference constituting man, is taken from the intellectual soul; while he is called "animal" by reason of his having a body animated by a sensitive soul. Therefore the intellectual soul may be compared to the body animated by a sensitive soul, as form to matter. Therefore in man the intellectual soul is not essentially the same as the sensitive soul, but presupposes it as a material subject.
Iª q. 76 a. 3 arg. 4 Praeterea, philosophus dicit, in VIII Metaphys., quod genus sumitur a materia, differentia vero a forma. Sed rationale, quod est differentia constitutiva hominis, sumitur ab anima intellectiva; animal vero dicitur ex hoc quod habet corpus animatum anima sensitiva. Anima ergo intellectiva comparatur ad corpus animatum anima sensitiva, sicut forma ad materiam. Non ergo anima intellectiva est eadem per essentiam cum anima sensitiva in homine; sed praesupponit eam sicut materiale suppositum.
Iª q. 76 a. 3 s. c. Sed contra est quod dicitur in libro de Eccles. Dogmat., neque duas animas esse dicimus in homine uno, sicut Iacobus et alii Syrorum scribunt, unam animalem, qua animatur corpus, et immixta sit sanguini, et alteram spiritualem, quae rationi ministret, sed dicimus unam et eandem esse animam in homine, quae et corpus sua societate vivificat, et semetipsam sua ratione disponit. On the contrary, It is said in the book De Ecclesiasticis Dogmatibus xv: "Nor do we say that there are two souls in one man, as James and other Syrians write; one, animal, by which the body is animated, and which is mingled with the blood; the other, spiritual, which obeys the reason; but we say that it is one and the same soul in man, that both gives life to the body by being united to it, and orders itself by its own reasoning."
Iª q. 76 a. 3 co. Respondeo dicendum quod Plato posuit diversas animas esse in corpore uno, etiam secundum organa distinctas, quibus diversa opera vitae attribuebat; dicens vim nutritivam esse in hepate, concupiscibilem in corde, cognoscitivam in cerebro. Quam quidem opinionem Aristoteles reprobat, in libro de anima, quantum ad illas animae partes quae corporeis organis in suis operibus utuntur, ex hoc quod in animalibus quae decisa vivunt, in qualibet parte inveniuntur diversae operationes animae, sicut sensus et appetitus. Hoc autem non esset, si diversa principia operationum animae, tanquam per essentiam diversae, diversis partibus corporis distributa essent. Sed de intellectiva sub dubio videtur relinquere utrum sit separata ab aliis partibus animae solum ratione, an etiam loco. Opinio autem Platonis sustineri utique posset, si poneretur quod anima unitur corpori, non ut forma, sed ut motor, ut posuit Plato. Nihil enim inconveniens sequitur, si idem mobile a diversis motoribus moveatur, praecipue secundum diversas partes. Sed si ponamus animam corpori uniri sicut formam, omnino impossibile videtur plures animas per essentiam differentes in uno corpore esse. Quod quidem triplici ratione manifestari potest. Primo quidem, quia animal non esset simpliciter unum, cuius essent animae plures. Nihil enim est simpliciter unum nisi per formam unam, per quam habet res esse, ab eodem enim habet res quod sit ens et quod sit una; et ideo ea quae denominantur a diversis formis, non sunt unum simpliciter, sicut homo albus. Si igitur homo ab alia forma haberet quod sit vivum, scilicet ab anima vegetabili; et ab alia forma quod sit animal, scilicet ab anima sensibili; et ab alia quod sit homo, scilicet ab anima rationali; sequeretur quod homo non esset unum simpliciter, sicut et Aristoteles argumentatur contra Platonem, in VIII Metaphys., quod si alia esset idea animalis, et alia bipedis, non esset unum simpliciter animal bipes. Et propter hoc, in I de anima, contra ponentes diversas animas in corpore, inquirit quid contineat illas, idest quid faciat ex eis unum. Et non potest dici quod uniantur per corporis unitatem, quia magis anima continet corpus, et facit ipsum esse unum, quam e converso. Secundo, hoc apparet impossibile ex modo praedicationis. Quae enim sumuntur a diversis formis, praedicantur ad invicem vel per accidens, si formae non sint ad invicem ordinatae, puta cum dicimus quod album est dulce, vel, si formae sint ordinatae ad invicem, erit praedicatio per se, in secundo modo dicendi per se, quia subiectum ponitur in definitione praedicati. Sicut superficies praeambula est ad colorem, si ergo dicamus quod corpus superficiatum est coloratum, erit secundus modus praedicationis per se. Si ergo alia forma sit a qua aliquid dicitur animal, et a qua aliquid dicitur homo, sequeretur quod vel unum horum non possit praedicari de altero nisi per accidens, si istae duae formae ad invicem ordinem non habent; vel quod sit ibi praedicatio in secundo modo dicendi per se, si una animarum sit ad aliam praeambula. Utrumque autem horum est manifeste falsum, quia animal per se de homine praedicatur, non per accidens; homo autem non ponitur in definitione animalis, sed e converso. Ergo oportet eandem formam esse per quam aliquid est animal, et per quam aliquid est homo, alioquin homo non vere esset id quod est animal, ut sic animal per se de homine praedicetur. Tertio, apparet hoc esse impossibile per hoc, quod una operatio animae, cum fuerit intensa, impedit aliam. Quod nullo modo contingeret, nisi principium actionum esset per essentiam unum. Sic ergo dicendum quod eadem numero est anima in homine sensitiva et intellectiva et nutritiva. Quomodo autem hoc contingat, de facili considerari potest, si quis differentias specierum et formarum attendat. Inveniuntur enim rerum species et formae differre ab invicem secundum perfectius et minus perfectum, sicut in rerum ordine animata perfectiora sunt inanimatis, et animalia plantis, et homines animalibus brutis, et in singulis horum generum sunt gradus diversi. Et ideo Aristoteles, in VIII Metaphys., assimilat species rerum numeris, qui differunt specie secundum additionem vel subtractionem unitatis. Et in II de anima, comparat diversas animas speciebus figurarum, quarum una continet aliam; sicut pentagonum continet tetragonum, et excedit. Sic igitur anima intellectiva continet in sua virtute quidquid habet anima sensitiva brutorum, et nutritiva plantarum. Sicut ergo superficies quae habet figuram pentagonam, non per aliam figuram est tetragona, et per aliam pentagona; quia superflueret figura tetragona, ex quo in pentagona continetur; ita nec per aliam animam Socrates est homo, et per aliam animal, sed per unam et eandem. I answer that, Plato held that there were several souls in one body, distinct even as to organs, to which souls he referred the different vital actions, saying that the nutritive power is in the liver, the concupiscible in the heart, and the power of knowledge in the brain. Which opinion is rejected by Aristotle (De Anima ii, 2), with regard to those parts of the soul which use corporeal organs; for this reason, that in those animals which continue to live when they have been divided in each part are observed the operations of the soul, as sense and appetite. Now this would not be the case if the various principles of the soul's operations were essentially different, and distributed in the various parts of the body. But with regard to the intellectual part, he seems to leave it in doubt whether it be "only logically" distinct from the other parts of the soul, "or also locally." The opinion of Plato might be maintained if, as he held, the soul was supposed to be united to the body, not as its form, but as its motor. For it involves nothing unreasonable that the same movable thing be moved by several motors; and still less if it be moved according to its various parts. If we suppose, however, that the soul is united to the body as its form, it is quite impossible for several essentially different souls to be in one body. This can be made clear by three different reasons. In the first place, an animal would not be absolutely one, in which there were several souls. For nothing is absolutely one except by one form, by which a thing has existence: because a thing has from the same source both existence and unity; and therefore things which are denominated by various forms are not absolutely one; as, for instance, "a white man." If, therefore, man were 'living' by one form, the vegetative soul, and 'animal' by another form, the sensitive soul, and "man" by another form, the intellectual soul, it would follow that man is not absolutely one. Thus Aristotle argues, Metaph. viii (Did. vii, 6), against Plato, that if the idea of an animal is distinct from the idea of a biped, then a biped animal is not absolutely one. For this reason, against those who hold that there are several souls in the body, he asks (De Anima i, 5), "what contains them?"--that is, what makes them one? It cannot be said that they are united by the one body; because rather does the soul contain the body and make it one, than the reverse. Secondly, this is proved to be impossible by the manner in which one thing is predicated of another. Those things which are derived from various forms are predicated of one another, either accidentally, (if the forms are not ordered to one another, as when we say that something white is sweet), or essentially, in the second manner of essential predication, (if the forms are ordered one to another, the subject belonging to the definition of the predicate; as a surface is presupposed to color; so that if we say that a body with a surface is colored, we have the second manner of essential predication.) Therefore, if we have one form by which a thing is an animal, and another form by which it is a man, it follows either that one of these two things could not be predicated of the other, except accidentally, supposing these two forms not to be ordered to one another--or that one would be predicated of the other according to the second manner of essential predication, if one soul be presupposed to the other. But both of these consequences are clearly false: because "animal" is predicated of man essentially and not accidentally; and man is not part of the definition of an animal, but the other way about. Therefore of necessity by the same form a thing is animal and man; otherwise man would not really be the thing which is an animal, so that animal can be essentially predicated of man. Thirdly, this is shown to be impossible by the fact that when one operation of the soul is intense it impedes another, which could never be the case unless the principle of action were essentially one. We must therefore conclude that in man the sensitive soul, the intellectual soul, and the nutritive soul are numerically one soul. This can easily be explained, if we consider the differences of species and forms. For we observe that the species and forms of things differ from one another, as the perfect and imperfect; as in the order of things, the animate are more perfect than the inanimate, and animals more perfect than plants, and man than brute animals; and in each of these genera there are various degrees. For this reason Aristotle, Metaph. viii (Did. vii, 3), compares the species of things to numbers, which differ in species by the addition or subtraction of unity. And (De Anima ii, 3) he compares the various souls to the species of figures, one of which contains another; as a pentagon contains and exceeds a tetragon. Thus the intellectual soul contains virtually whatever belongs to the sensitive soul of brute animals, and to the nutritive souls of plants. Therefore, as a surface which is of a pentagonal shape, is not tetragonal by one shape, and pentagonal by another--since a tetragonal shape would be superfluous as contained in the pentagonal--so neither is Socrates a man by one soul, and animal by another; but by one and the same soul he is both animal and man.
Iª q. 76 a. 3 ad 1 Ad primum ergo dicendum quod anima sensitiva non habet incorruptibilitatem ex hoc quod est sensitiva, sed ex hoc quod est intellectiva, ei incorruptibilitas debetur. Quando ergo anima est sensitiva tantum, corruptibilis est, quando vero cum sensitivo intellectivum habet, est incorruptibilis. Licet enim sensitivum incorruptionem non det, tamen incorruptionem intellectivo auferre non potest. Reply to Objection 1. The sensitive soul is incorruptible, not by reason of its being sensitive, but by reason of its being intellectual. When, therefore, a soul is sensitive only, it is corruptible; but when with sensibility it has also intellectuality, it is incorruptible. For although sensibility does not give incorruptibility, yet it cannot deprive intellectuality of its incorruptibility.
Iª q. 76 a. 3 ad 2 Ad secundum dicendum quod formae non collocantur in genere vel in specie, sed composita. Homo autem corruptibilis est, sicut et alia animalia. Unde differentia secundum corruptibile et incorruptibile, quae est ex parte formarum, non facit hominem secundum genus ab aliis animalibus differre. Reply to Objection 2. Not forms, but composites, are classified either generically or specifically. Now man is corruptible like other animals. And so the difference of corruptible and incorruptible which is on the part of the forms does not involve a generic difference between man and the other animals.
Iª q. 76 a. 3 ad 3 Ad tertium dicendum quod prius embryo habet animam quae est sensitiva tantum; qua abiecta, advenit perfectior anima, quae est simul sensitiva et intellectiva; ut infra plenius ostendetur. Reply to Objection 3. The embryo has first of all a soul which is merely sensitive, and when this is removed, it is supplanted by a more perfect soul, which is both sensitive and intellectual: as will be shown further on (118, 2, ad 2).
Iª q. 76 a. 3 ad 4 Ad quartum dicendum quod non oportet secundum diversas rationes vel intentiones logicas, quae consequuntur modum intelligendi, diversitatem in rebus naturalibus accipere, quia ratio unum et idem secundum diversos modos apprehendere potest. Quia igitur, ut dictum est, anima intellectiva virtute continet id quod sensitiva habet, et adhuc amplius; potest seorsum ratio considerare quod pertinet ad virtutem sensitivae, quasi quoddam imperfectum et materiale. Et quia hoc invenit commune homini et aliis animalibus, ex hoc rationem generis format. Id vero in quo anima intellectiva sensitiva excedit, accipit quasi formale et completivum, et ex eo format differentiam hominis. Reply to Objection 4. We must not consider the diversity of natural things as proceeding from the various logical notions or intentions, which flow from our manner of understanding, because reason can apprehend one and the same thing in various ways. Therefore since, as we have said, the intellectual soul contains virtually what belongs to the sensitive soul, and something more, reason can consider separately what belongs to the power of the sensitive soul, as something imperfect and material. And because it observes that this is something common to man and to other animals, it forms thence the notion of the "genus"; while that wherein the intellectual soul exceeds the sensitive soul, it takes as formal and perfecting; thence it gathers the "difference" of man.
Iª q. 76 a. 4 arg. 1 Ad quartum sic proceditur. Videtur quod in homine sit alia forma praeter animam intellectivam. Dicit enim philosophus, in II de anima, quod anima est actus corporis physici potentia vitam habentis. Comparatur igitur anima ad corpus, sicut forma ad materiam. Sed corpus habet aliquam formam substantialem per quam est corpus. Ergo ante animam praecedit in corpore aliqua forma substantialis. Objection 1. It would seem that in man there is another form besides the intellectual soul. For the Philosopher says (De Anima ii, 1), that "the soul is the act of a physical body which has life potentially." Therefore the soul is to the body as a form of matter. But the body has a substantial form by which it is a body. Therefore some other substantial form in the body precedes the soul.
Iª q. 76 a. 4 arg. 2 Praeterea, homo et quodlibet animal est movens seipsum. Omne autem movens seipsum dividitur in duas partes, quarum una est movens, et alia est mota, ut probatur in VIII Physic. Pars autem movens est anima. Ergo oportet quod alia pars sit talis quae possit esse mota. Sed materia prima non potest moveri, ut dicitur in V Physic., cum sit ens solum in potentia, quinimmo omne quod movetur est corpus. Ergo oportet quod in homine et in quolibet animali sit alia forma substantialis, per quam constituatur corpus. Objection 2. Further, man moves himself as every animal does. Now everything that moves itself is divided into two parts, of which one moves, and the other is moved, as the Philosopher proves (Phys. viii, 5). But the part which moves is the soul. Therefore the other part must be such that it can be moved. But primary matter cannot be moved (Phys. v, 1), since it is a being only potentially; indeed everything that is moved is a body. Therefore in man and in every animal there must be another substantial form, by which the body is constituted.
Iª q. 76 a. 4 arg. 3 Praeterea, ordo in formis attenditur secundum habitudinem ad materiam primam, prius enim et posterius dicitur per comparationem ad aliquod principium. Si ergo non esset in homine alia forma substantialis praeter animam rationalem, sed immediate materiae primae inhaereret; sequeretur quod esset in ordine imperfectissimarum formarum, quae immediate inhaerent materiae. Objection 3. Further, the order of forms depends on their relation to primary matter; for "before" and "after" apply by comparison to some beginning. Therefore if there were not in man some other substantial form besides the rational soul, and if this were to inhere immediately to primary matter; it would follow that it ranks among the most imperfect forms which inhere to matter immediately.
Iª q. 76 a. 4 arg. 4 Praeterea, corpus humanum est corpus mixtum. Mixtio autem non fit secundum materiam tantum, quia tunc esset corruptio sola. Oportet ergo quod remaneant formae elementorum in corpore mixto, quae sunt formae substantiales. Ergo in corpore humano sunt aliae formae substantiales praeter animam intellectivam. Objection 4. Further, the human body is a mixed body. Now mingling does not result from matter alone; for then we should have mere corruption. Therefore the forms of the elements must remain in a mixed body; and these are substantial forms. Therefore in the human body there are other substantial forms besides the intellectual soul.
Iª q. 76 a. 4 s. c. Sed contra, unius rei est unum esse substantiale. Sed forma substantialis dat esse substantiale. Ergo unius rei est una tantum forma substantialis. Anima autem est forma substantialis hominis. Ergo impossibile est quod in homine sit aliqua alia forma substantialis quam anima intellectiva. On the contrary, Of one thing there is but one substantial being. But the substantial form gives substantial being. Therefore of one thing there is but one substantial form. But the soul is the substantial form of man. Therefore it is impossible for there to be in man another substantial form besides the intellectual soul.
Iª q. 76 a. 4 co. Respondeo dicendum quod, si poneretur anima intellectiva non uniri corpori ut forma, sed solum ut motor, ut Platonici posuerunt; necesse esset dicere quod in homine esset alia forma substantialis, per quam corpus ab anima mobile in suo esse constitueretur. Sed si anima intellectiva unitur corpori ut forma substantialis, sicut supra iam diximus, impossibile est quod aliqua alia forma substantialis praeter eam inveniatur in homine. Ad cuius evidentiam, considerandum est quod forma substantialis in hoc a forma accidentali differt quia forma accidentalis non dat esse simpliciter, sed esse tale, sicut calor facit suum subiectum non simpliciter esse, sed esse calidum. Et ideo cum advenit forma accidentalis, non dicitur aliquid fieri vel generari simpliciter, sed fieri tale aut aliquo modo se habens, et similiter cum recedit forma accidentalis, non dicitur aliquid corrumpi simpliciter, sed secundum quid. Forma autem substantialis dat esse simpliciter, et ideo per eius adventum dicitur aliquid simpliciter generari, et per eius recessum simpliciter corrumpi. Et propter hoc antiqui naturales, qui posuerunt materiam primam esse aliquod ens actu, puta ignem aut aerem aut aliquid huiusmodi, dixerunt quod nihil generatur aut corrumpitur simpliciter, sed omne fieri statuerunt alterari, ut dicitur in I Physic. Si igitur ita esset, quod praeter animam intellectivam praeexisteret quaecumque alia forma substantialis in materia, per quam subiectum animae esset ens actu; sequeretur quod anima non daret esse simpliciter; et per consequens quod non esset forma substantialis; et quod per adventum animae non esset generatio simpliciter, neque per eius abscessum corruptio simpliciter, sed solum secundum quid. Quae sunt manifeste falsa. Unde dicendum est quod nulla alia forma substantialis est in homine, nisi sola anima intellectiva; et quod ipsa, sicut virtute continet animam sensitivam et nutritivam, ita virtute continet omnes inferiores formas, et facit ipsa sola quidquid imperfectiores formae in aliis faciunt. Et similiter est dicendum de anima sensitiva in brutis, et de nutritiva in plantis, et universaliter de omnibus formis perfectioribus respectu imperfectiorum. I answer that, If we suppose that the intellectual soul is not united to the body as its form, but only as its motor, as the Platonists maintain, it would necessarily follow that in man there is another substantial form, by which the body is established in its being as movable by the soul. If, however, the intellectual soul be united to the body as its substantial form, as we have said above (1), it is impossible for another substantial form besides the intellectual soul to be found in man. In order to make this evident, we must consider that the substantial form differs from the accidental form in this, that the accidental form does not make a thing to be "simply," but to be "such," as heat does not make a thing to be simply, but only to be hot. Therefore by the coming of the accidental form a thing is not said to be made or generated simply, but to be made such, or to be in some particular condition; and in like manner, when an accidental form is removed, a thing is said to be corrupted, not simply, but relatively. Now the substantial form gives being simply; therefore by its coming a thing is said to be generated simply; and by its removal to be corrupted simply. For this reason, the old natural philosophers, who held that primary matter was some actual being--for instance, fire or air, or something of that sort--maintained that nothing is generated simply, or corrupted simply; and stated that "every becoming is nothing but an alteration," as we read, Phys. i, 4. Therefore, if besides the intellectual soul there pre-existed in matter another substantial form by which the subject of the soul were made an actual being, it would follow that the soul does not give being simply; and consequently that it is not the substantial form: and so at the advent of the soul there would not be simple generation; nor at its removal simple corruption, all of which is clearly false. Whence we must conclude, that there is no other substantial form in man besides the intellectual soul; and that the soul, as it virtually contains the sensitive and nutritive souls, so does it virtually contain all inferior forms, and itself alone does whatever the imperfect forms do in other things. The same is to be said of the sensitive soul in brute animals, and of the nutritive soul in plants, and universally of all more perfect forms with regard to the imperfect.
Iª q. 76 a. 4 ad 1 Ad primum ergo dicendum quod Aristoteles non dicit animam esse actum corporis tantum, sed actum corporis physici organici potentia vitam habentis, et quod talis potentia non abiicit animam. Unde manifestum est quod in eo cuius anima dicitur actus, etiam anima includitur; eo modo loquendi quo dicitur quod calor est actus calidi, et lumen est actus lucidi; non quod seorsum sit lucidum sine luce, sed quia est lucidum per lucem. Et similiter dicitur quod anima est actus corporis etc., quia per animam et est corpus, et est organicum, et est potentia vitam habens. Sed actus primus dicitur in potentia respectu actus secundi, qui est operatio. Talis enim potentia est non abiiciens, idest non excludens, animam. Reply to Objection 1. Aristotle does not say that the soul is the act of a body only, but "the act of a physical organic body which has life potentially"; and that this potentiality "does not reject the soul." Whence it is clear that when the soul is called the act, the soul itself is included; as when we say that heat is the act of what is hot, and light of what is lucid; not as though lucid and light were two separate things, but because a thing is made lucid by the light. In like manner, the soul is said to be the "act of a body," etc., because by the soul it is a body, and is organic, and has life potentially. Yet the first act is said to be in potentiality to the second act, which is operation; for such a potentiality "does not reject"--that is, does not exclude--the soul.
Iª q. 76 a. 4 ad 2 Ad secundum dicendum quod anima non movet corpus per esse suum, secundum quod unitur corpori ut forma; sed per potentiam motivam, cuius actus praesupponit iam corpus effectum in actu per animam; ut sic anima secundum vim motivam sit pars movens, et corpus animatum sit pars mota. Reply to Objection 2. The soul does not move the body by its essence, as the form of the body, but by the motive power, the act of which presupposes the body to be already actualized by the soul: so that the soul by its motive power is the part which moves; and the animate body is the part moved.
Iª q. 76 a. 4 ad 3 Ad tertium dicendum quod in materia considerantur diversi gradus perfectionis, sicut esse, vivere sentire et intelligere. Semper autem secundum superveniens priori, perfectius est. Forma ergo quae dat solum primum gradum perfectionis materiae, est imperfectissima, sed forma quae dat primum et secundum, et tertium, et sic deinceps, est perfectissima; et tamen materiae immediata. Reply to Objection 3. We observe in matter various degrees of perfection, as existence, living, sensing, and understanding. Now what is added is always more perfect. Therefore that form which gives matter only the first degree of perfection is the most imperfect; while that form which gives the first, second, and third degree, and so on, is the most perfect: and yet it inheres to matter immediately.
Iª q. 76 a. 4 ad 4 Ad quartum dicendum quod Avicenna posuit formas substantiales elementorum integras remanere in mixto, mixtionem autem fieri secundum quod contrariae qualitates elementorum reducuntur ad medium. Sed hoc est impossibile. Quia diversae formae elementorum non possunt esse nisi in diversis partibus materiae; ad quarum diversitatem oportet intelligi dimensiones, sine quibus materia divisibilis esse non potest. Materia autem dimensioni subiecta non invenitur nisi in corpore. Diversa autem corpora non possunt esse in eodem loco. Unde sequitur quod elementa sint in mixto distincta secundum situm. Et ita non erit vera mixtio, quae est secundum totum, sed mixtio ad sensum, quae est secundum minima iuxta se posita. Averroes autem posuit, in III de caelo, quod formae elementorum, propter sui imperfectionem, sunt mediae inter formas accidentales et substantiales; et ideo recipiunt magis et minus; et ideo remittuntur in mixtione et ad medium reducuntur, et conflatur ex eis una forma. Sed hoc est etiam magis impossibile. Nam esse substantiale cuiuslibet rei in indivisibili consistit; et omnis additio et subtractio variat speciem, sicut in numeris, ut dicitur in VIII Metaphys. Unde impossibile est quod forma substantialis quaecumque recipiat magis et minus. Nec minus est impossibile aliquid esse medium inter substantiam et accidens. Et ideo dicendum est, secundum philosophum in I de Generat., quod formae elementorum manent in mixto non actu, sed virtute. Manent enim qualitates propriae elementorum, licet remissae, in quibus est virtus formarum elementarium. Et huiusmodi qualitas mixtionis est propria dispositio ad formam substantialem corporis mixti, puta formam lapidis, vel animae cuiuscumque. Reply to Objection 4. Avicenna held that the substantial forms of the elements remain entire in the mixed body; and that the mixture is made by the contrary qualities of the elements being reduced to an average. But this is impossible, because the various forms of the elements must necessarily be in various parts of matter; for the distinction of which we must suppose dimensions, without which matter cannot be divisible. Now matter subject to dimension is not to be found except in a body. But various bodies cannot be in the same place. Whence it follows that elements in the mixed body would be distinct as to situation. And then there would not be a real mixture which is in respect of the whole; but only a mixture apparent to sense, by the juxtaposition of particles. Averroes maintained that the forms of elements, by reason of their imperfection, are a medium between accidental and substantial forms, and so can be "more" or "less"; and therefore in the mixture they are modified and reduced to an average, so that one form emerges from them. But this is even still more impossible. For the substantial being of each thing consists in something indivisible, and every addition and subtraction varies the species, as in numbers, as stated in Metaph. viii (Did. vii, 3); and consequently it is impossible for any substantial form to receive "more" or "less." Nor is it less impossible for anything to be a medium between substance and accident. Therefore we must say, in accordance with the Philosopher (De Gener. i, 10), that the forms of the elements remain in the mixed body, not actually but virtually. For the proper qualities of the elements remain, though modified; and in them is the power of the elementary forms. This quality of the mixture is the proper disposition for the substantial form of the mixed body; for instance, the form of a stone, or of any sort of soul.
Iª q. 76 a. 5 arg. 1 Ad quintum sic proceditur. Videtur quod anima intellectiva inconvenienter tali corpori uniatur. Materia enim debet esse proportionata formae. Sed anima intellectiva est forma incorruptibilis. Non ergo convenienter unitur corpori corruptibili. Objection 1. It would seem that the intellectual soul is improperly united to such a body. For matter must be proportionate to the form. But the intellectual soul is incorruptible. Therefore it is not properly united to a corruptible body.
Iª q. 76 a. 5 arg. 2 Praeterea, anima intellectiva est forma maxime immaterialis, cuius signum est, quod habet operationem in qua non communicat materia corporalis. Sed quanto corpus est subtilius, tanto minus habet de materia. Ergo anima deberet subtilissimo corpori uniri, puta igni; et non corpori mixto, et terrestri magis. Objection 2. Further, the intellectual soul is a perfectly immaterial form; a proof whereof is its operation in which corporeal matter does not share. But the more subtle is the body, the less has it of matter. Therefore the soul should be united to a most subtle body, to fire, for instance, and not to a mixed body, still less to a terrestrial body.
Iª q. 76 a. 5 arg. 3 Praeterea, cum forma sit principium speciei, ab una forma non proveniunt diversae species. Sed anima intellectiva est una forma. Ergo non debet uniri corpori quod componitur ex partibus dissimilium specierum. Objection 3. Further, since the form is the principle of the species, one form cannot produce a variety of species. But the intellectual soul is one form. Therefore, it should not be united to a body which is composed of parts belonging to various species.
Iª q. 76 a. 5 arg. 4 Praeterea, perfectioris formae debet esse perfectius susceptibile. Sed anima intellectiva est perfectissima animarum. Cum igitur aliorum animalium corpora habeant naturaliter insita tegumenta, puta pilorum loco vestium, et unguium loco calceamentorum; habeant etiam arma naturaliter sibi data, sicut ungues, dentes et cornua, ergo videtur quod anima intellectiva non debuerit uniri corpori imperfecto tanquam talibus auxiliis privato. Objection 4. Further, what is susceptible of a more perfect form should itself be more perfect. But the intellectual soul is the most perfect of souls. Therefore since the bodies of other animals are naturally provided with a covering, for instance, with hair instead of clothes, and hoofs instead of shoes; and are, moreover, naturally provided with arms, as claws, teeth, and horns; it seems that the intellectual soul should not have been united to a body which is imperfect as being deprived of the above means of protection.
Iª q. 76 a. 5 s. c. Sed contra est quod dicit philosophus, in II de anima, quod anima est actus corporis physici organici potentia vitam habentis. On the contrary, The Philosopher says (De Anima ii, 1), that "the soul is the act of a physical organic body having life potentially."
Iª q. 76 a. 5 co. Respondeo dicendum quod, cum forma non sit propter materiam, sed potius materia propter formam; ex forma oportet rationem accipere quare materia sit talis, et non e converso. Anima autem intellectiva, sicut supra habitum est, secundum naturae ordinem, infimum gradum in substantiis intellectualibus tenet; intantum quod non habet naturaliter sibi inditam notitiam veritatis, sicut Angeli, sed oportet quod eam colligat ex rebus divisibilibus per viam sensus, ut Dionysius dicit, VII cap. de Div. Nom. Natura autem nulli deest in necessariis, unde oportuit quod anima intellectiva non solum haberet virtutem intelligendi, sed etiam virtutem sentiendi. Actio autem sensus non fit sine corporeo instrumento. Oportuit igitur animam intellectivam tali corpori uniri, quod possit esse conveniens organum sensus. Omnes autem alii sensus fundantur supra tactum. Ad organum autem tactus requiritur quod sit medium inter contraria, quae sunt calidum et frigidum, humidum et siccum, et similia, quorum est tactus apprehensivus, sic enim est in potentia ad contraria, et potest ea sentire. Unde quanto organum tactus fuerit magis reductum ad aequalitatem complexionis, tanto perceptibilior erit tactus. Anima autem intellectiva habet completissime virtutem sensitivam, quia quod est inferioris praeexistit perfectius in superiori ut dicit Dionysius in libro de Div. Nom. Unde oportuit corpus cui unitur anima intellectiva, esse corpus mixtum, inter omnia alia magis reductum ad aequalitatem complexionis. Et propter hoc homo inter omnia animalia melioris est tactus. Et inter ipsos homines, qui sunt melioris tactus, sunt melioris intellectus. Cuius signum est, quod molles carne bene aptos mente videmus, ut dicitur in II de anima. I answer that, Since the form is not for the matter, but rather the matter for the form, we must gather from the form the reason why the matter is such as it is; and not conversely. Now the intellectual soul, as we have seen above (55, 2) in the order of nature, holds the lowest place among intellectual substances; inasmuch as it is not naturally gifted with the knowledge of truth, as the angels are; but has to gather knowledge from individual things by way of the senses, as Dionysius says (Div. Nom. vii). But nature never fails in necessary things: therefore the intellectual soul had to be endowed not only with the power of understanding, but also with the power of feeling. Now the action of the senses is not performed without a corporeal instrument. Therefore it behooved the intellectual soul to be united to a body fitted to be a convenient organ of sense. Now all the other senses are based on the sense of touch. But the organ of touch requires to be a medium between contraries, such as hot and cold, wet and dry, and the like, of which the sense of touch has the perception; thus it is in potentiality with regard to contraries, and is able to perceive them. Therefore the more the organ of touch is reduced to an equable complexion, the more sensitive will be the touch. But the intellectual soul has the power of sense in all its completeness; because what belongs to the inferior nature pre-exists more perfectly in the superior, as Dionysius says (Div. Nom. v). Therefore the body to which the intellectual soul is united should be a mixed body, above others reduced to the most equable complexion. For this reason among animals, man has the best sense of touch. And among men, those who have the best sense of touch have the best intelligence. A sign of which is that we observe "those who are refined in body are well endowed in mind," as stated in De Anima ii, 9.
Iª q. 76 a. 5 ad 1 Ad primum ergo dicendum quod hanc obiectionem aliquis forte vellet evadere per hoc, quod diceret corpus hominis ante peccatum incorruptibile fuisse. Sed haec responsio non videtur sufficiens, quia corpus hominis ante peccatum immortale fuit non per naturam, sed per gratiae divinae donum; alioquin immortalitas eius per peccatum sublata non esset, sicut nec immortalitas Daemonis. Et ideo aliter dicendum est, quod in materia duplex conditio invenitur, una quae eligitur ad hoc quod sit conveniens formae; alia quae ex necessitate consequitur prioris dispositionis. Sicut artifex ad formam serrae eligit materiam ferream, aptam ad secandum dura; sed quod dentes serrae hebetari possint et rubiginem contrahere, sequitur ex necessitate materiae. Sic igitur et animae intellectivae debetur corpus quod sit aequalis complexionis, ex hoc autem de necessitate materiae sequitur quod sit corruptibile. Si quis vero dicat quod Deus potuit hanc necessitatem vitare, dicendum est quod in constitutione rerum naturalium non consideratur quid Deus facere possit, sed quid naturae rerum conveniat, ut Augustinus dicit, II super Gen. ad Litt. Providit tamen Deus adhibendo remedium contra mortem per gratiae donum. Reply to Objection 1. Perhaps someone might attempt to answer this by saying that before sin the human body was incorruptible. This answer does not seem sufficient; because before sin the human body was immortal not by nature, but by a gift of Divine grace; otherwise its immortality would not be forfeited through sin, as neither was the immortality of the devil. Therefore we answer otherwise by observing that in matter two conditions are to be found; one which is chosen in order that the matter be suitable to the form; the other which follows by force of the first disposition. The artisan, for instance, for the form of the saw chooses iron adapted for cutting through hard material; but that the teeth of the saw may become blunt and rusted, follows by force of the matter itself. So the intellectual soul requires a body of equable complexion, which, however, is corruptible by force of its matter. If, however, it be said that God could avoid this, we answer that in the formation of natural things we do not consider what God might do; but what is suitable to the nature of things, as Augustine says (Gen. ad lit. ii, 1). God, however, provided in this case by applying a remedy against death in the gift of grace.
Iª q. 76 a. 5 ad 2 Ad secundum dicendum quod animae intellectivae non debetur corpus propter ipsam intellectualem operationem secundum se; sed propter sensitivam virtutem, quae requirit organum aequaliter complexionatum. Et ideo oportuit animam intellectivam tali corpori uniri, et non simplici elemento, vel corpori mixto in quo excederet ignis secundum quantitatem, quia non posset esse aequalitas complexionis, propter excedentem ignis activam virtutem. Habet autem hoc corpus aequaliter complexionatum quandam dignitatem, per hoc quod est remotum a contrariis; in quo quodammodo assimilatur corpori caelesti. Reply to Objection 2. A body is not necessary to the intellectual soul by reason of its intellectual operation considered as such; but on account of the sensitive power, which requires an organ of equable temperament. Therefore the intellectual soul had to be united to such a body, and not to a simple element, or to a mixed body, in which fire was in excess; because otherwise there could not be an equability of temperament. And this body of an equable temperament has a dignity of its own by reason of its being remote from contraries, thereby resembling in a way a heavenly body.
Iª q. 76 a. 5 ad 3 Ad tertium dicendum quod partes animalis, ut oculus, manus, caro et os, et huiusmodi, non sunt in specie, sed totum, et ideo non potest dici, proprie loquendo, quod sint diversarum specierum, sed quod sint diversarum dispositionum. Et hoc competit animae intellectivae, quae quamvis sit una secundum essentiam, tamen propter sui perfectionem est multiplex in virtute; et ideo, ad diversas operationes, indiget diversis dispositionibus in partibus corporis cui unitur. Et propter hoc videmus quod maior est diversitas partium in animalibus perfectis quam in imperfectis, et in his quam in plantis. Reply to Objection 3. The parts of an animal, for instance, the eye, hand, flesh, and bones, and so forth, do not make the species; but the whole does, and therefore, properly speaking, we cannot say that these are of different species, but that they are of various dispositions. This is suitable to the intellectual soul, which, although it be one in its essence, yet on account of its perfection, is manifold in power: and therefore, for its various operations it requires various dispositions in the parts of the body to which it is united. For this reason we observe that there is a greater variety of parts in perfect than in imperfect animals; and in these a greater variety than in plants.
Iª q. 76 a. 5 ad 4 Ad quartum dicendum quod anima intellectiva, quia est universalium comprehensiva, habet virtutem ad infinita. Et ideo non potuerunt sibi determinari a natura vel determinatae existimationes naturales, vel etiam determinata auxilia vel defensionum vel tegumentorum; sicut aliis animalibus, quorum animae habent apprehensionem et virtutem ad aliqua particularia determinata. Sed loco horum omnium, homo habet naturaliter rationem, et manus, quae sunt organa organorum, quia per eas homo potest sibi praeparare instrumenta infinitorum modorum, et ad infinitos effectus. Reply to Objection 4. The intellectual soul as comprehending universals, has a power extending to the infinite; therefore it cannot be limited by nature to certain fixed natural notions, or even to certain fixed means whether of defence or of clothing, as is the case with other animals, the souls of which are endowed with knowledge and power in regard to fixed particular things. Instead of all these, man has by nature his reason and his hands, which are "the organs of organs" (De Anima iii), since by their means man can make for himself instruments of an infinite variety, and for any number of purposes.
Iª q. 76 a. 6 arg. 1 Ad sextum sic proceditur. Videtur quod anima intellectiva uniatur corpori mediantibus aliquibus dispositionibus accidentalibus. Omnis enim forma est in materia sibi propria et disposita. Sed dispositiones ad formam sunt accidentia quaedam. Ergo oportet praeintelligi accidentia aliqua in materia ante formam substantialem, et ita ante animam, cum anima sit quaedam substantialis forma. Objection 1. It would seem that the intellectual soul is united to the body through the medium of accidental dispositions. For every form exists in its proper disposed matter. But dispositions to a form are accidents. Therefore we must presuppose accidents to be in matter before the substantial form; and therefore before the soul, since the soul is a substantial form.
Iª q. 76 a. 6 arg. 2 Praeterea, diversae formae unius speciei requirunt diversas materiae partes. Partes autem materiae diversae non possunt intelligi nisi secundum divisionem dimensivarum quantitatum. Ergo oportet intelligere dimensiones in materia ante formas substantiales, quae sunt multae unius speciei. Objection 2. Further, various forms of one species require various parts of matter. But various parts of matter are unintelligible without division in measurable quantities. Therefore we must suppose dimensions in matter before the substantial forms, which are many belonging to one species.
Iª q. 76 a. 6 arg. 3 Praeterea, spirituale applicatur corporali per contactum virtutis. Virtus autem animae est eius potentia. Ergo videtur quod anima unitur corpori mediante potentia, quae est quoddam accidens. Objection 3. Further, what is spiritual is connected with what is corporeal by virtual contact. But the virtue of the soul is its power. Therefore it seems that the soul is united to the body by means of a power, which is an accident.
Iª q. 76 a. 6 s. c. Sed contra est quod accidens est posterius substantia et tempore et ratione, ut dicitur in VII Metaphys. Non ergo forma accidentalis aliqua potest intelligi in materia ante animam, quae est forma substantialis. On the contrary, Accident is posterior to substance, both in the order of time and in the order of reason, as the Philosopher says, Metaph. vii (Did. vi, 1). Therefore it is unintelligible that any accidental form exist in matter before the soul, which is the substantial form.
Iª q. 76 a. 6 co. Respondeo dicendum quod, si anima uniretur corpori solum ut motor, nihil prohiberet, immo magis necessarium esset esse aliquas dispositiones medias inter animam et corpus, potentiam scilicet ex parte animae, per quam moveret corpus; et aliquam habilitatem ex parte corporis, per quam corpus esset ab anima mobile. Sed si anima intellectiva unitur corpori ut forma substantialis, sicut iam supra dictum est, impossibile est quod aliqua dispositio accidentalis cadat media inter corpus et animam, vel inter quamcumque formam substantialem et materiam suam. Et huius ratio est quia, cum materia sit in potentia ad omnes actus ordine quodam, oportet quod id quod est primum simpliciter in actibus, primo in materia intelligatur. Primum autem inter omnes actus est esse. Impossibile est ergo intelligere materiam prius esse calidam vel quantam, quam esse in actu. Esse autem in actu habet per formam substantialem, quae facit esse simpliciter, ut iam dictum est. Unde impossibile est quod quaecumque dispositiones accidentales praeexistant in materia ante formam substantialem; et per consequens neque ante animam. I answer that, If the soul were united to the body, merely as a motor, there would be nothing to prevent the existence of certain dispositions mediating between the soul and the body; on the contrary, they would be necessary, for on the part of the soul would be required the power to move the body; and on the part of the body, a certain aptitude to be moved by the soul. If, however, the intellectual soul is united to the body as the substantial form, as we have already said above (1), it is impossible for any accidental disposition to come between the body and the soul, or between any substantial form whatever and its matter. The reason is because since matter is in potentiality to all manner of acts in a certain order, what is absolutely first among the acts must be understood as being first in matter. Now the first among all acts is existence. Therefore, it is impossible for matter to be apprehended as hot, or as having quantity, before it is actual. But matter has actual existence by the substantial form, which makes it to exist absolutely, as we have said above (4). Wherefore it is impossible for any accidental dispositions to pre-exist in matter before the substantial form, and consequently before the soul.
Iª q. 76 a. 6 ad 1 Ad primum ergo dicendum quod, sicut ex praedictis patet, forma perfectior virtute continet quidquid est inferiorum formarum. Et ideo una et eadem existens, perficit materiam secundum diversos perfectionis gradus. Una enim et eadem forma est per essentiam, per quam homo est ens actu, et per quam est corpus, et per quam est vivum, et per quam est animal, et per quam est homo. Manifestum est autem quod unumquodque genus consequuntur propria accidentia. Sicut ergo materia praeintelligitur perfecta secundum esse ante intellectum corporeitatis, et sic de aliis; ita praeintelliguntur accidentia quae sunt propria entis, ante corporeitatem. Et sic praeintelliguntur dispositiones in materia ante formam, non quantum ad omnem eius effectum, sed quantum ad posteriorem. Reply to Objection 1. As appears from what has been already said (4), the more perfect form virtually contains whatever belongs to the inferior forms; therefore while remaining one and the same, it perfects matter according to the various degrees of perfection. For the same essential form makes man an actual being, a body, a living being, an animal, and a man. Now it is clear that to every "genus" follow its own proper accidents. Therefore as matter is apprehended as perfected in its existence, before it is understood as corporeal, and so on; so those accidents which belong to existence are understood to exist before corporeity; and thus dispositions are understood in matter before the form, not as regards all its effects, but as regards the subsequent effect.
Iª q. 76 a. 6 ad 2 Ad secundum dicendum quod dimensiones quantitativae sunt accidentia consequentia corporeitatem, quae toti materiae convenit. Unde materia iam intellecta sub corporeitate et dimensionibus, potest intelligi ut distincta in diversas partes, ut sic accipiat diversas formas secundum ulteriores perfectionis gradus. Quamvis enim eadem forma sit secundum essentiam quae diversos perfectionis gradus materiae attribuit, ut dictum est; tamen secundum considerationem rationis differt. Reply to Objection 2. Dimensions of quantity are accidents consequent to the corporeity which belongs to the whole matter. Wherefore matter, once understood as corporeal and measurable, can be understood as distinct in its various parts, and as receptive of different forms according to the further degrees of perfection. For although it is essentially the same form which gives matter the various degrees of perfection, as we have said (ad 1), yet it is considered as different when brought under the observation of reason.
Iª q. 76 a. 6 ad 3 Ad tertium dicendum quod substantia spiritualis quae unitur corpori solum ut motor, unitur ei per potentiam vel virtutem. Sed anima intellectiva corpori unitur ut forma per suum esse. Administrat tamen ipsum et movet per suam potentiam et virtutem. Reply to Objection 3. A spiritual substance which is united to a body as its motor only, is united thereto by power or virtue. But the intellectual soul is united by its very being to the body as a form; and yet it guides and moves the body by its power and virtue.
Iª q. 76 a. 7 arg. 1 Ad septimum sic proceditur. Videtur quod anima uniatur corpori animalis mediante aliquo corpore. Dicit enim Augustinus, VII super Gen. ad Litt., quod anima per lucem, idest ignem, et aerem, quae sunt similiora spiritui, corpus administrat. Ignis autem et aer sunt corpora. Ergo anima unitur corpori humano mediante aliquo corpore. Objection 1. It seems that the soul is united to the animal body by means of a body. For Augustine says (Gen. ad lit. vii, 19), that "the soul administers the body by light," that is, by fire, "and by air, which is most akin to a spirit." But fire and air are bodies. Therefore the soul is united to the human body by means of a body.
Iª q. 76 a. 7 arg. 2 Praeterea, id quo subtracto solvitur unio aliquorum unitorum, videtur esse medium inter ea. Sed deficiente spiritu, anima a corpore separatur. Ergo spiritus, qui est quoddam corpus subtile, medium est in unione corporis et animae. Objection 2. Further, a link between two things seems to be that thing the removal of which involves the cessation of their union. But when breathing ceases, the soul is separated from the body. Therefore the breath, which is a subtle body, is the means of union between soul and body.
Iª q. 76 a. 7 arg. 3 Praeterea, ea quae sunt multum distantia, non uniuntur nisi per medium. Sed anima intellectiva distat a corpore et quia est incorporea, et quia est incorruptibilis. Ergo videtur quod uniatur ei mediante aliquo quod sit corpus incorruptibile. Et hoc videtur esse aliqua lux caelestis, quae conciliat elementa et redigit in unum. Objection 3. Further, things which are very distant from one another, are not united except by something between them. But the intellectual soul is very distant from the body, both because it is incorporeal, and because it is incorruptible. Therefore it seems to be united to the body by means of an incorruptible body, and such would be some heavenly light, which would harmonize the elements, and unite them together.
Iª q. 76 a. 7 s. c. Sed contra est quod philosophus dicit, in II de anima, quod non oportet quaerere si unum est anima et corpus, sicut neque ceram et figuram. Sed figura unitur cerae nullo corpore mediante. Ergo et anima corpori. On the contrary, The Philosopher says (De Anima ii, 1): "We need not ask if the soul and body are one, as neither do we ask if wax and its shape are one." But the shape is united to the wax without a body intervening. Therefore also the soul is thus united to the body.
Iª q. 76 a. 7 co. Respondeo dicendum quod si anima, secundum Platonicos, corpori uniretur solum ut motor, conveniens esset dicere quod inter animam hominis, vel cuiuscumque animalis, et corpus aliqua alia corpora media intervenirent, convenit enim motori aliquid distans per media magis propinqua movere. Si vero anima unitur corpori ut forma, sicut iam dictum est, impossibile est quod uniatur ei aliquo corpore mediante. Cuius ratio est, quia sic dicitur aliquid unum, quomodo et ens. Forma autem per seipsam facit rem esse in actu, cum per essentiam suam sit actus; nec dat esse per aliquod medium. Unde unitas rei compositae ex materia et forma est per ipsam formam, quae secundum seipsam unitur materiae ut actus eius. Nec est aliquid aliud uniens nisi agens, quod facit materiam esse in actu, ut dicitur in VIII Metaphys. Unde patet esse falsas opiniones eorum qui posuerunt aliqua corpora esse media inter animam et corpus hominis. Quorum quidam Platonici dixerunt quod anima intellectiva habet corpus incorruptibile sibi naturaliter unitum, a quo nunquam separatur, et eo mediante unitur corpori hominis corruptibili. Quidam vero dixerunt quod unitur corpori mediante spiritu corporeo. Alii vero dixerunt quod unitur corpori mediante luce, quam dicunt esse corpus, et de natura quintae essentiae, ita quod anima vegetabilis unitur corpori mediante luce caeli siderei; anima vero sensibilis, mediante luce caeli crystallini; anima vero intellectualis, mediante luce caeli Empyrei. Quod fictitium et derisibile apparet, tum quia lux non est corpus; tum quia quinta essentia non venit materialiter in compositionem corporis mixti, cum sit inalterabilis, sed virtualiter tantum; tum etiam quia anima immediate corpori unitur ut forma materiae. I answer that, If the soul, according to the Platonists, were united to the body merely as a motor, it would be right to say that some other bodies must intervene between the soul and body of man, or any animal whatever; for a motor naturally moves what is distant from it by means of something nearer. If, however, the soul is united to the body as its form, as we have said (1), it is impossible for it to be united by means of another body. The reason of this is that a thing is one, according as it is a being. Now the form, through itself, makes a thing to be actual since it is itself essentially an act; nor does it give existence by means of something else. Wherefore the unity of a thing composed of matter and form, is by virtue of the form itself, which by reason of its very nature is united to matter as its act. Nor is there any other cause of union except the agent, which causes matter to be in act, as the Philosopher says, Metaph. viii (Did. vii, 6). From this it is clear how false are the opinions of those who maintained the existence of some mediate bodies between the soul and body of man. Of these certain Platonists said that the intellectual soul has an incorruptible body naturally united to it, from which it is never separated, and by means of which it is united to the corruptible body of man. Others said that the soul is united to the body by means of a corporeal spirit. Others said it is united to the body by means of light, which, they say, is a body and of the nature of the fifth essence; so that the vegetative soul would be united to the body by means of the light of the sidereal heaven; the sensible soul, by means of the light of the crystal heaven; and the intellectual soul by means of the light of the empyrean heaven. Now all this is fictious and ridiculous: for light is not a body; and the fifth essence does not enter materially into the composition of a mixed body (since it is unchangeable), but only virtually: and lastly, because the soul is immediately united to the body as the form to matter.
Iª q. 76 a. 7 ad 1 Ad primum ergo dicendum quod Augustinus loquitur de anima inquantum movet corpus, unde utitur verbo administrationis. Et verum est quod partes grossiores corporis per subtiliores movet. Et primum instrumentum virtutis motivae est spiritus, ut dicit philosophus in libro de causa motus animalium. Reply to Objection 1. Augustine speaks there of the soul as it moves the body; whence he uses the word "administration." It is true that it moves the grosser parts of the body by the more subtle parts. And the first instrument of the motive power is a kind of spirit, as the Philosopher says in De causa motus animalium (De mot. animal. x).
Iª q. 76 a. 7 ad 2 Ad secundum dicendum quod, subtracto spiritu, deficit unio animae ad corpus, non quia sit medium; sed quia tollitur dispositio per quam corpus est dispositum ad talem unionem. Est tamen spiritus medium in movendo, sicut primum instrumentum motus. Reply to Objection 2. The union of soul and body ceases at the cessation of breath, not because this is the means of union, but because of the removal of that disposition by which the body is disposed for such a union. Nevertheless the breath is a means of moving, as the first instrument of motion.
Iª q. 76 a. 7 ad 3 Ad tertium dicendum quod anima distat quidem a corpore plurimum, si utriusque conditiones seorsum considerentur, unde si utrumque ipsorum separatim esse haberet, oporteret quod multa media intervenirent. Sed inquantum anima est forma corporis, non habet esse seorsum ab esse corporis; sed per suum esse corpori unitur immediate. Sic enim et quaelibet forma, si consideretur ut actus, habet magnam distantiam a materia, quae est ens in potentia tantum. Reply to Objection 3. The soul is indeed very distant from the body, if we consider the condition of each separately: so that if each had a separate existence, many means of connection would have to intervene. But inasmuch as the soul is the form of the body, it has not an existence apart from the existence of the body, but by its own existence is united to the body immediately. This is the case with every form which, if considered as an act, is very distant from matter, which is a being only in potentiality.
Iª q. 76 a. 8 arg. 1 Ad octavum sic proceditur. Videtur quod anima non sit tota in qualibet parte corporis. Dicit enim philosophus, in libro de causa motus animalium, non opus est in unaquaque corporis parte esse animam; sed in quodam principio corporis existente, alia vivere; eo quod simul nata sunt facere proprium motum per naturam. Objection 1. It would seem that the whole soul is not in each part of the body; for the Philosopher says in De causa motus animalium (De mot. animal. x): "It is not necessary for the soul to be in each part of the body; it suffices that it be in some principle of the body causing the other parts to live, for each part has a natural movement of its own."
Iª q. 76 a. 8 arg. 2 Praeterea, anima est in corpore cuius est actus. Sed est actus corporis organici. Ergo non est nisi in corpore organico. Sed non quaelibet pars corporis hominis est corpus organicum. Ergo anima non est in qualibet parte corporis tota. Objection 2. Further, the soul is in the body of which it is the act. But it is the act of an organic body. Therefore it exists only in an organic body. But each part of the human body is not an organic body. Therefore the whole soul is not in each part.
Iª q. 76 a. 8 arg. 3 Praeterea, in II de anima dicitur quod sicut se habet pars animae ad partem corporis, ut visus ad pupillam, ita anima tota ad totum corpus animalis. Si igitur tota anima est in qualibet parte corporis, sequitur quod quaelibet pars corporis sit animal. Objection 3. Further, the Philosopher says (De Anima. ii, 1) that the relation of a part of the soul to a part of the body, such as the sight to the pupil of the eye, is the same as the relation of the soul to the whole body of an animal. If, therefore, the whole soul is in each part of the body, it follows that each part of the body is an animal.
Iª q. 76 a. 8 arg. 4 Praeterea, omnes potentiae animae in ipsa essentia animae fundantur. Si igitur anima tota est in qualibet parte corporis, sequitur quod omnes potentiae animae sint in qualibet corporis parte, et ita visus erit in aure, et auditus in oculo. Quod est inconveniens. Objection 4. Further, all the powers of the soul are rooted in the essence of the soul. If, therefore, the whole soul be in each part of the body, it follows that all the powers of the soul are in each part of the body; thus the sight will be in the ear, and hearing in the eye, and this is absurd.
Iª q. 76 a. 8 arg. 5 Praeterea, si in qualibet parte corporis esset tota anima, quaelibet pars corporis immediate dependeret ab anima. Non ergo una pars dependeret ab alia, nec una pars esset principalior quam alia, quod est manifeste falsum. Non ergo anima est in qualibet parte corporis tota. Objection 5. Further, if the whole soul is in each part of the body, each part of the body is immediately dependent on the soul. Thus one part would not depend on another; nor would one part be nobler than another; which is clearly untrue. Therefore the soul is not in each part of the body.
Iª q. 76 a. 8 s. c. Sed contra est quod Augustinus dicit, in VI de Trin., quod anima in quocumque corpore et in toto est tota, et in qualibet eius parte tota est. On the contrary, Augustine says (De Trin. vi, 6), that "in each body the whole soul is in the whole body, and in each part is entire."
Iª q. 76 a. 8 co. Respondeo dicendum quod, sicut in aliis iam dictum est, si anima uniretur corpori solum ut motor, posset dici quod non esset in qualibet parte corporis, sed in una tantum, per quam alias moveret. Sed quia anima unitur corpori ut forma, necesse est quod sit in toto, et in qualibet parte corporis. Non enim est forma corporis accidentalis, sed substantialis. Substantialis autem forma non solum est perfectio totius, sed cuiuslibet partis. Cum enim totum consistat ex partibus, forma totius quae non dat esse singulis partibus corporis, est forma quae est compositio et ordo, sicut forma domus, et talis forma est accidentalis. Anima vero est forma substantialis, unde oportet quod sit forma et actus non solum totius, sed cuiuslibet partis. Et ideo, recedente anima, sicut non dicitur animal et homo nisi aequivoce, quemadmodum et animal pictum vel lapideum; ita est de manu et oculo, aut carne et osse, ut philosophus dicit. Cuius signum est, quod nulla pars corporis habet proprium opus, anima recedente, cum tamen omne quod retinet speciem, retineat operationem speciei. Actus autem est in eo cuius est actus. Unde oportet animam esse in toto corpore, et in qualibet eius parte. Et quod tota sit in qualibet parte eius, hinc considerari potest, quia, cum totum sit quod dividitur in partes, secundum triplicem divisionem est triplex totalitas. Est enim quoddam totum quod dividitur in partes quantitativas, sicut tota linea vel totum corpus. Est etiam quoddam totum quod dividitur in partes rationis et essentiae; sicut definitum in partes definitionis, et compositum resolvitur in materiam et formam. Tertium autem totum est potentiale, quod dividitur in partes virtutis. Primus autem totalitatis modus non convenit formis, nisi forte per accidens; et illis solis formis, quae habent indifferentem habitudinem ad totum quantitativum et partes eius. Sicut albedo, quantum est de sui ratione, aequaliter se habet ut sit in tota superficie et in qualibet superficiei parte; et ideo, divisa superficie, dividitur albedo per accidens. Sed forma quae requirit diversitatem in partibus, sicut est anima, et praecipue animalium perfectorum, non aequaliter se habet ad totum et partes, unde non dividitur per accidens per divisionem quantitatis. Sic ergo totalitas quantitativa non potest attribui animae nec per se nec per accidens. Sed totalitas secunda, quae attenditur secundum rationis et essentiae perfectionem, proprie et per se convenit formis. Similiter autem et totalitas virtutis, quia forma est operationis principium. Si ergo quaereretur de albedine, utrum esset tota in tota superficie et in qualibet eius parte, distinguere oporteret. Quia si fiat mentio de totalitate quantitativa, quam habet albedo per accidens, non tota esset in qualibet parte superficiei. Et similiter dicendum est de totalitate virtutis magis enim potest movere visum albedo quae est in tota superficie, quam albedo quae est in aliqua eius particula. Sed si fiat mentio de totalitate speciei et essentiae, tota albedo est in qualibet superficiei parte. Sed quia anima totalitatem quantitativam non habet, nec per se nec per accidens, ut dictum est; sufficit dicere quod anima tota est in qualibet parte corporis secundum totalitatem perfectionis et essentiae; non autem secundum totalitatem virtutis. Quia non secundum quamlibet suam potentiam est in qualibet parte corporis; sed secundum visum in oculo, secundum auditum in aure, et sic de aliis. Tamen attendendum est quod, quia anima requirit diversitatem in partibus, non eodem modo comparatur ad totum et ad partes, sed ad totum quidem primo et per se, sicut ad proprium et proportionatum perfectibile; ad partes autem per posterius, secundum quod habent ordinem ad totum. I answer that, As we have said, if the soul were united to the body merely as its motor, we might say that it is not in each part of the body, but only in one part through which it would move the others. But since the soul is united to the body as its form, it must necessarily be in the whole body, and in each part thereof. For it is not an accidental form, but the substantial form of the body. Now the substantial form perfects not only the whole, but each part of the whole. For since a whole consists of parts, a form of the whole which does not give existence to each of the parts of the body, is a form consisting in composition and order, such as the form of a house; and such a form is accidental. But the soul is a substantial form; and therefore it must be the form and the act, not only of the whole, but also of each part. Therefore, on the withdrawal of the soul, as we do not speak of an animal or a man unless equivocally, as we speak of a painted animal or a stone animal; so is it with the hand, the eye, the flesh and bones, as the Philosopher says (De Anima ii, 1). A proof of which is, that on the withdrawal of the soul, no part of the body retains its proper action; although that which retains its species, retains the action of the species. But act is in that which it actuates: wherefore the soul must be in the whole body, and in each part thereof. That it is entire in each part thereof, may be concluded from this, that since a whole is that which is divided into parts, there are three kinds of totality, corresponding to three kinds of division. There is a whole which is divided into parts of quantity, as a whole line, or a whole body. There is also a whole which is divided into logical and essential parts: as a thing defined is divided into the parts of a definition, and a composite into matter and form. There is, further, a third kind of whole which is potential, divided into virtual parts. The first kind of totality does not apply to forms, except perhaps accidentally; and then only to those forms, which have an indifferent relationship to a quantitative whole and its parts; as whiteness, as far as its essence is concerned, is equally disposed to be in the whole surface and in each part of the surface; and, therefore, the surface being divided, the whiteness is accidentally divided. But a form which requires variety in the parts, such as a soul, and specially the soul of perfect animals, is not equally related to the whole and the parts: hence it is not divided accidentally when the whole is divided. So therefore quantitative totality cannot be attributed to the soul, either essentially or accidentally. But the second kind of totality, which depends on logical and essential perfection, properly and essentially belongs to forms: and likewise the virtual totality, because a form is the principle of operation. Therefore if it be asked whether the whole whiteness is in the whole surface and in each part thereof, it is necessary to distinguish. If we mean quantitative totality which whiteness has accidentally, then the whole whiteness is not in each part of the surface. The same is to be said of totality of power: since the whiteness which is in the whole surface moves the sight more than the whiteness which is in a small part thereof. But if we mean totality of species and essence, then the whole whiteness is in each part of a surface. Since, however, the soul has not quantitative totality, neither essentially, nor accidentally, as we have seen; it is enough to say that the whole soul is in each part of the body, by totality of perfection and of essence, but not by totality of power. For it is not in each part of the body, with regard to each of its powers; but with regard to sight, it is in the eye; and with regard to hearing, it is in the ear; and so forth. We must observe, however, that since the soul requires variety of parts, its relation to the whole is not the same as its relation to the parts; for to the whole it is compared primarily and essentially, as to its proper and proportionate perfectible; but to the parts, secondarily, inasmuch as they are ordained to the whole.
Iª q. 76 a. 8 ad 1 Ad primum ergo dicendum quod philosophus loquitur de potentia motiva animae. Reply to Objection 1. The Philosopher is speaking there of the motive power of the soul.
Iª q. 76 a. 8 ad 2 Ad secundum dicendum quod anima est actus corporis organici, sicut primi et proportionati perfectibilis. Reply to Objection 2. The soul is the act of an organic body, as of its primary and proportionate perfectible.
Iª q. 76 a. 8 ad 3 Ad tertium dicendum quod animal est quod componitur ex anima et corpore toto, quod est primum et proportionatum eius perfectibile. Sic autem anima non est in parte. Unde non oportet quod pars animalis sit animal. Reply to Objection 3. An animal is that which is composed of a soul and a whole body, which is the soul's primary and proportionate perfectible. Thus the soul is not in a part. Whence it does not follow that a part of an animal is an animal.
Iª q. 76 a. 8 ad 4 Ad quartum dicendum quod potentiarum animae quaedam sunt in ea secundum quod excedit totam corporis capacitatem, scilicet intellectus et voluntas, unde huiusmodi potentiae in nulla parte corporis esse dicuntur. Aliae vero potentiae sunt communes animae et corpori, unde talium potentiarum non oportet quod quaelibet sit in quocumque est anima; sed solum in illa parte corporis quae est proportionata ad talis potentiae operationem. Reply to Objection 4. Some of the powers of the soul are in it according as it exceeds the entire capacity of the body, namely the intellect and the will; whence these powers are not said to be in any part of the body. Other powers are common to the soul and body; wherefore each of these powers need not be wherever the soul is, but only in that part of the body, which is adapted to the operation of such a power.
Iª q. 76 a. 8 ad 5 Ad quintum dicendum quod una pars corporis dicitur esse principalior quam alia, propter potentias diversas quarum sunt organa partes corporis. Quae enim est principalioris potentiae organum, est principalior pars corporis, vel quae etiam eidem potentiae principalius deservit. Reply to Objection 5. One part of the body is said to be nobler than another, on account of the various powers, of which the parts of the body are the organs. For that part which is the organ of a nobler power, is a nobler part of the body: as also is that part which serves the same power in a nobler manner.

Notes

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