ACTIVITY DOES NOT ALTER THE QUALITY.
Will we therefore have to admit that activity, which is activity only because it is a quality, is something substantially different from quality? In animated beings, especially in those capable of choice because they incline towards this or that thing, activity has a really substantial nature. What is the nature of the action exercised by the inanimate powers that we call qualities? Is it participation in their qualities by whatever approaches them? Further, if the power which acts on something else simultaneously experiences (or "suffers"), how can it still remain active? For the greater thing, which by itself is three feet in size, is great or small only by the relation established between it, and something else (smaller). It might indeed be objected that the greater thing and the smaller thing become such only by participation in greatness or smallness. Likewise, what is both "active" and "passive" becomes such in participating in "activity" and "passivity."