Plotinus: Fifth Ennead, Eighth Tractate
Let us, then, make a mental picture of our universe: each member shall remain what it is, distinctly apart; yet all is to form, as far as possible, a complete unity so that whatever comes into view shall show as if it were the surface of the orb over all, bringing immediately with it the vision, on the one plane, of the sun and of all the stars with earth and sea and all living things as if exhibited upon a transparent globe.
Bring this vision actually before your sight, so that there shall be in your mind the gleaming representation of a sphere, a picture holding sprung, themselves, of that universe and repose or some at rest, some in motion. Keep this sphere before you, and from it imagine another, a sphere stripped of magnitude and of spatial differences; cast out your inborn sense of Matter, taking care not merely to attenuate it: call on God, maker of the sphere whose image you now hold, and pray Him to enter. And may He come bringing His own Universe with all the Gods that dwell in it- He who is the one God and all the gods, where each is all, blending into a unity, distinct in powers but all one god in virtue of that one divine power of many facets.
More truly, this is the one God who is all the gods; for, in the coming to be of all those, this, the one, has suffered no diminishing. He and all have one existence while each again is distinct. It is distinction by state without interval: there is no outward form to set one here and another there and to prevent any from being an entire identity; yet there is no sharing of parts from one to another. Nor is each of those divine wholes a power in fragment, a power totalling to the sum of the measurable segments: the divine is one all-power, reaching out to infinity, powerful to infinity; and so great is God that his very members are infinites. What place can be named to which He does not reach?
Great, too, is this firmament of ours and all the powers constellated within it, but it would be greater still, unspeakably, but that there is inbound in it something of the petty power of body; no doubt the powers of fire and other bodily substances might themselves be thought very great, but in fact, it is through their failure in the true power that we see them burning, destroying, wearing things away, and slaving towards the production of life; they destroy because they are themselves in process of destruction, and they produce because they belong to the realm of the produced.
The power in that other world has merely Being and Beauty of Being. Beauty without Being could not be, nor Being voided of Beauty: abandoned of Beauty, Being loses something of its essence. Being is desirable because it is identical with Beauty; and Beauty is loved because it is Being. How then can we debate which is the cause of the other, where the nature is one? The very figment of Being needs some imposed image of Beauty to make it passable and even to ensure its existence; it exists to the degree in which it has taken some share in the beauty of Idea; and the more deeply it has drawn on this, the less imperfect it is, precisely because the nature which is essentially the beautiful has entered into it the more intimately.