WITHOUT SOMETHING SIMPLE, NOTHING MANIFOLD COULD EXIST.
Indeed, that which is identical in things other than the One, may no doubt be similar to the One, but cannot be the One. The One must exist alone in itself, thus to be grasped in other things, unless we should claim that its (nature) consists in subsisting with other things. Under this hypothesis, there will not exist either anything absolutely simple, nor anything composite. Nothing absolutely simple will exist, since that which is simple could not subsist by itself; neither could anything composite exist, since nothing simple will exist. For if no simple thing possess existence, if there be no simple unity, subsisting by itself, which could serve as support to the composite, if none of these things be capable of existing by itself, let alone communicating to others, since it does not exist; we must conclude that that which, of all these things, is composite, could not exist, since it would be made up out of elements that do not exist, and which are absolutely nothing. Therefore, if we insist on the existence of the manifold, we are implying the existence of the One before the manifold. Now since that which thinks is multiple, the principle that is not manifold will not think. But as this Principle is the first, then Intelligence and thought are entities later than the first.
GOOD, INTELLIGENCE AND SOUL ARE LIKE LIGHT, SUN AND MOON.
4. As the Good must be simple, and self-sufficient, it has no need to think. Now that which it does not need could not be within it, since nothing (that is different from it) exists in it; consequently, thought does not exist in it (because it is essentially simple[12]). Besides, the Good is one thing, and Intelligence another; by thinking, Intelligence takes on the form of Good. Besides, when in two objects unity is joined to something other than itself, it is not possible that this unity, which is joined to something else, should be Unity itself. Unity in itself should exist in itself before this unity was joined to anything else. For the same reason, unity joined to something else presupposes absolutely simple Unity, which subsists in itself, and has nothing of what is found in unity joined to other things. How could one thing subsist in another if the principle, from which this other thing is derived, did not have an existence that was independent, and prior to the rest? What is simple cannot derive anything from any other source; but what is manifold, or at least indicates plurality, is of derivative (nature). The Good may be compared to light, Intelligence to the sun, and the Soul to the moon that derives her light from the sun. The Soul's intelligence is only borrowed, which intellectualizes her by coloring her with its light. On the contrary, Intelligence, in itself, possesses its own light; it is not only light, but it is essentially luminous. The Principle that illuminates Intelligence and which is nothing but light, is absolutely simple light, and supplies Intelligence with the power to be what it is. How could it need anything else? It is not similar to what exists in anything else; for what subsists in itself is very different from what subsists in something else.