Kitap 11
10
The reason for considering motion to be indeterminate is that it cannot be associated either with the potentiality or with the actuality of things; for neither that which is potentially nor that which is actually of a certain size is necessarily moved.
11
And motion is considered to be a kind of actualization, but incompleteCf. note on sect. 2 (end) above, and Aristot. Met. 9.6.7-10.; the reason of this is that the potential, of which it is the actualization, is incomplete.
11
Thus it is difficult to comprehend what motion is; for we must associate it either with privation or with potentiality or with absolute actuality; and apparently none of these is possible.
12
There remains, then, the account which we have given; that it is an actuality, and an actuality of the kind which we have described, which is hard to visualize but capable of existing.
12
That motion is in the movable is evident; for it is the complete realization of the movable by that which is capable of causing motion, and the actualization of that which is capable of causing motion is identical with that of the movable.
