The Six Books of Proclus on the Theology of Plato, Volume 2

For if beings which subsist by themselves, are prior to those which are certain beings, as being common to all essences, and principal causes, and not the causes of certain, but in short of all beings, it is necessary that the first bound, and the first infinity should be prior to that[246] which consists of both these. For the bound in that which is mixed [or the first being,] participates of infinity, and the infinite participates of bound. But of every thing, that which is the first, is nothing else than that which it is. It is not therefore proper that the first infinite should have the form of bound, or that the first bound should have the form of infinity. These therefore subsist primarily prior to that which is mixed.