The one absolutely, the Intelligible, the ever Preexisting, comprehending all the universe together within the One — nay, more, is not the whole world One living thing — all and everywhere full of life and soul, perfect and made up out of parts likewise perfect? Now of this double unity the most perfect part (I mean of the Unity in the Intelligible World that comprehends all things in One, and of the Unity encompassing the Sensible World, that brings together all things into a single and perfect nature) is the perfection of the sovereign Sun, which is central and single, and placed in the middle of the intermediate Powers.

Upon the Sovereign Sun (362)