Plotinos: Complete Works, v. 3 In Chronological Order,...

Shall the affections which consist in the forms and powers, and their contraries, the privations, be called qualities?267 If so, one kind will no longer exist; and we shall have to reduce these things to a unity, or category; that is why knowledge is called a form and a power, and ignorance a privation and impotence. Must we also consider impotence and sickness a form, because sickness and vice can and do accomplish many things badly? Not so, for in this case he who missed his aim would be exerting a power. Each one of these things exerts its characteristic activity in not inclining towards the good; for it could not do what was not in its power. Beauty certainly does have some power; is it so also with triangularity? In general, quality should not be made to consist in power, but rather in the disposition, and to consider it as a kind of form of character. Thus the common element in all qualities is found to be this form, this classification, which no doubt is inherent in being, but which certainly is derivative from it.