THE CATEGORIES OF MOVEMENT AND DIFFERENCE APPLIED TO INTELLIGIBLES.
The difference that is in the intelligible world ever produces matter; for, in that world, it is the difference that is the principle of matter, as well as of primary motion. That is why the latter is also called difference, because difference and primary motion were born simultaneously.[286]
The movement and difference, that proceed from the First (the Good), are indeterminate, and need it, to be determinate. Now they determine each other when they turn towards it. Formerly, matter was as indeterminate as difference; it was not good because it was not yet illuminated by the radiance of the First. Since the First is the source of all light, the object that receives light from the First does not always possess light; this object differs from light, and possesses light as something alien, because it derives light from some other source. That is the nature of matter as contained in intelligible (entities). Perhaps this treatment of the subject is longer than necessary.