I A M B L I C H V S

from a genus indeterminate in itself and a differentiating factor that limits it. For those substances are complete species, everywhere in an act that is determined and complete. If separable substances, as simple things, do not differ among themselves by specific differences under the same genus, therefore they do not differ by individual [differences] under the same species. Each one, therefore, is as if a single genus or species existing by itself. They differ, however, by themselves and by the order of their degrees, and because they are referred to the First in different ways. Intelligences do not agree or differ among themselves by genus or any differences; for they are most simple, but they are disposed according to whether they are referred to the First by the same or a different reason, and some are in prior and others in subsequent degrees of perfection. The differences of things among themselves in actions and passions must everywhere be resolved into the differences of powers, and these into the differences of essences, and one must not rest anywhere in the latter, but must proceed to the former. Neither in superior substances nor in our soul is there any passive motion; rather, the whole is an efficacious act. The motion of the soul, by which it is moved from itself, is not divided into mover and moved, or into moving and being moved, but is an essential act proceeding