Authors/Ockham/Summa Logicae/Book I/Chapter 56

Latin	English
[CAP. 56. DE PRAEDICAMENTO QUALITATIS SECUNDUM ALIAM OPINIONEM]	[Chapter 56. On the category of quality according to another opinion]
Alii autem ponunt quod quaelibet qualitas est res distincta realiter a substantia et quantitate et rebus respectivis. Et assignant quatuor species qualitatis, quarum contenta realiter inter se distinguuntur.	Now others suppose that every quality is something really distinct from substance and from quantity and related things. And they assign four species of quality, the contents of which are really distinguished from one another.
Unde ponunt quod habitus et dispositio constituunt primam speciem qualitatis, quae distinguuntur, quia habitus est de difficili mobilis, dispositio vero de facili mobilis est. Secundam speciem ponunt esse potentiam naturalem vel impotentiam, quae distinguuntur ab habitu et dispositione. Tertiam speciem ponunt passionem et passibilem qualitatem, omnem scilicet qualitatem sensibilem. Quartam speciem ponunt formam et figuram, quam ponunt distingui realiter a substantia et qualitatibus aliarum specierum. Unde etiam dicunt quod quando aliquod corpus rectum curvatur vere unam rem absolutam amitttit et aliam rem absolutam novam adquirit. Proprietates autem easdem quas ponit Aristoteles ipsi attribuunt qualitati.	Hence, they suppose that having and disposition constitute the first species of quality, which are distinguished because having is difficult to change, but disposition is easy to change. They give the second species as natural power or lack of power, which are distinguished from having and from disposition. They give the third species as passivity and ‘passible quality’ (namely every sensible quality). They give the fourth species as form and figure, which they suppose are really distinguished from substance and from the qualities of other species. Hence they also say that when some straight body is curved, it truly loses one absolute thing, and acquires another absolute thing. But the same properties which Aristotle gives, they attribute to quality.