Enneads III.6: Of the Impassibility of Incorporeal Entities (Soul and and Matter)
Magnitude Is Only Appearance
18. Let us now suppose that a conception of magnitude were possessed by some being which would have the power not only to be in itself, but also to produce itself externally; and that it should meet a nature (such as matter) that was incapable of existing within intelligence, of having a form, of revealing any trace of real magnitude, or any quality. What would such a being do with such a power? It would create neither a horse nor an ox; for other causes (the "seminal) reasons" would produce them.[86] Indeed, that which proceeds from magnitude itself cannot be real magnitude; it must therefore be apparent magnitude.[87] Thus, since matter has not received real magnitude, all it can do is to be as great as its nature will permit; that is, to seem great. To accomplish that, it must not fail anywhere; and, if it be extended, it cannot be a discrete quantity, but all its parts must be united, and absent in no place. Indeed, it was impossible for a small mass to contain an image of magnitude that would equal the real magnitude, since it is only an image of magnitude; but, carried away with the hope of achieving the magnitude to which it aspired, this image extended to its limit, along with matter, which shared its extension because matter could not follow it. That is how this image of magnitude magnified what was not great, without however making it seem really great, and produced the magnitude that appears in its mass. None the less does matter preserve its nature, though it be veiled by this apparent magnitude, as if by a garment with which it covered itself when it followed the magnitude that involved it in its extension. If matter ever happened to be stripped of this garment, it would nevertheless remain what itself was before; for it possesses magnitude only in so far as form by its presence makes it great.[88]
IF MATTER WERE A PRIMARY PRINCIPLE, IT WOULD BE THE FORM OF THE UNIVERSE, SUCH AS SOUL IS.
As the soul possesses the forms of beings, and as she herself is a form, she possesses all things simultaneously.[89] Containing all the forms, and besides seeing the forms of sense-objects turning towards her, and approaching her, she is not willing to accept them, along with their manifoldness. She considers them only after making abstractions of their mass; for the soul could not become other than she is.[90] But as matter does not have the strength to resist, possessing as it does no special characteristic activity, and being no more than an adumbration, matter yields to everything that active power proposes to inflict on it. Besides, that which proceeds from intelligible (nature) possesses already a trace of what is to be produced in matter. That is how discursive reason which moves within the sphere of representative imagination, or the movement produced by reason, implies division; for if reason remained within unity and identity, it would not move, but remain at rest. Besides, not as the soul does, can matter receive all forms simultaneously; otherwise it would be a form. As it must contain all things, without however containing them in an indivisible manner, it is necessary that, serving as it does as location for all things, it should extend towards all of them, everywhere offering itself to all of them, avoiding no part of space, because it is not restricted within any boundary of space, and because it is always ready to receive what is to be. How then does it happen that one thing, on entering into matter, does not hinder the entrance of other things, which, however, cannot co-exist with the former thing? The reason is that matter is not a first principle. Otherwise, it would be the very form of the universe. Such a form, indeed, would be both all things simultaneously, and each thing in particular. Indeed the matter of the living being is divided as are the very parts of the living being; otherwise nothing but reason[91] would exist.