PHYSICAL CATEGORIES ARE MATTER, FORM, COMBINATION, ATTRIBUTES AND ACCIDENTS.

3. What classification shall we adopt? There is first matter, then form, and further the combination which results from their blending. Then we have a number of conceptions which refer to the three preceding classes, and are predicated of them; the first, simply, as attributes; the others, besides, as accidents. Among the latter, some are contained within the things, while others contain them; some of them are actions, and the others experiences (passions) or their consequences.