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

For if every God is unical, he defines and measures all the multitude of beings. For all multitudes being in their own nature indefinite, are bounded through the one. But that which is one being [or being characterized by the one] measuring and terminating the natures with which it is present, leads into bound that which according to its own power is not bounded. For the one being has the form of the one by participation.

But that which is uniform, or has the form of the one, recedes from indefiniteness and infinity. And by how much the more uniform it is, by so much the less[264] is it indefinite, and without measure. Every multitude of beings, therefore, is measured by the divine unities.