Enneads III.6: Of the Impassibility of Incorporeal Entities (Soul and and Matter)
Generation Illustrated by Lighting Fire by Refraction
If matter participated in the existence of genuine beings and received them within itself, as might easily be thought, that which would enter into it would penetrate deeply into matter; but evidently matter is not penetrated thereby, remaining unreceptive of any of it. On the contrary, matter arrests their "procession," as echo arrests and reflects sound-waves, matter being only the "residence" (or, “jar” or vase) of the things that enter within it, and there mingle with each other. Everything takes place there as in the case of persons who, wishing to light fire from the rays of the sun, should place in front of these rays polished jars filled with water, so that the flame, arrested by the obstacles met within, should not be able to penetrate, and should concentrate on their outside. That is how matter becomes the cause of generation; that is how things occur within it.
THE RELATION OF MATTER TO REASON ILLUSTRATED BY THAT OF OPINION AND IMAGINATION.
15. The objects that concentrate the rays of the sun, are themselves visible, by receiving from the fire of sensation what takes fire in their hearth. They appear because the images that form themselves are around and near them, and touch each other, and finally because there are two limits in these objects. But when the ("seminal) reason" is in matter, it remains exterior to matter in an entirely different manner; it has a different nature. Here it is not necessary that there be two limits; matter and reason are strangers to each other by difference of nature, and by the difference between their natures that makes any mixture of them impossible. The cause that each remains in itself is that what enters into matter does not possess it, any more than matter possesses what enters into it. That is how opinion and imagination do not mingle in our soul,[75] and each remains what it was, without entailing or leaving anything, because no mingling can occur. These powers are foreign to each other, not in that there is a mere juxtaposition, but because between them obtains a difference that is grasped by reason, instead of being seen by sight. Here imagination is a kind of phantom, though the soul herself be no phantom, and though she seem to accomplish, and though she really accomplish many deeds as she desires to accomplish them.
Thus imagination stands to the soul in about the same relation as (form) with matter. Nevertheless (imagination) does not hide the soul, whose operations often disarrange and disturb it. Never could imagination hide the soul entirely, even if imagination should penetrate the soul entirely, and should seem to veil it completely. Indeed, the soul contains operations and reasons contrary (to imagination), by which she succeeds in putting aside the phantoms that besiege her.[76] But matter, being infinitely feebler than the soul, possesses none of the beings, either of the true or false, which characteristically belong to it. Matter has nothing that could show it off, being absolutely denuded of all things. It is no more than a cause of appearance for other things; it could never say, "I am here, or there!" If, starting from other beings,[77] profound reasoning should succeed in discovering matter, it ultimately declares that matter is something completely abandoned by true beings; but as the things that are posterior to true beings themselves seem to exist, matter might, so to speak, be said to be extended in all these things, seeming both to follow them, and not to follow them.
THE MAGNITUDE OF MATTER IS REALLY DERIVED FROM THE SEMINAL REASON.
16. The ("seminal) reason," on approaching matter, and giving it the extension it desired, made of it a magnitude. The "reason" drew from itself the magnitude to give it to the matter, which did not possess it, and which did not, merely on that account, acquire size; otherwise the magnitude occurring within it would be magnitude itself. If we remove form from matter, the substrate that then remains neither seems nor is large (since magnitude is part of form). If what is produced in matter be a certain magnitude, as for instance a man or a horse, the magnitude characteristic of the horse disappears with the form of the horse.[78] If we say that a horse cannot be produced except in a mass of determined size, and that this magnitude remained (when the form of the horse disappeared), we would answer that what would then remain would not be the magnitude characteristic of the horse, but the magnitude of mass. Besides, if this mass were fire or earth, when the form of fire or that of earth disappeared, the magnitude of the fire or of the earth would simultaneously disappear. Matter therefore possesses neither figure nor quantity; otherwise, it would not have ceased being fire to become something else, but, remaining fire, would never "become" fire.[79] Now that it seems to have become as great as this universe, if the heavens, with all they contain were annihilated, all quantity would simultaneously disappear out of matter, and with quantity also the other inseparable qualities will disappear. Matter would then remain what it originally was by itself; it would keep none of the things that exist within it. Indeed, the objects that can be affected by the presence of contrary objects can, when the latter withdraw, keep some trace of them; but that which is impassible retains nothing; for instance, the air, when penetrated by the light, retains none of it when it disappears. That that which has no magnitude can become great is not any more surprising than that which has no heat can become hot. Indeed, for matter to be matter is something entirely different from its being magnitude; magnitude is as immaterial as figure. Of matter such as it really is we should say that it is all things by participation. Now magnitude forms part of what we call all things. As the bodies are composite, magnitude is there among the other qualities, without however being determinate therein. Indeed, the "reason" of the body also contains magnitude.[80] On the contrary, matter does not even contain indeterminate magnitude, because it is not a body.
MAGNITUDE IS AN IMAGE FORMED BY THE UNIVERSAL REFLECTION OF UNIVERSAL BEINGS.
17. Neither is matter magnitude itself; for magnitude is a form, and not a residence; it exists by itself[81] (for matter cannot even appropriate the images of beings). Not even in this respect, therefore, is matter magnitude. But as that which exists in intelligence or in the soul desired to acquire magnitude, it imparted to the things that desired to imitate magnitude by their aspiration or movement, the power to impress on some other object a modification analogous to their own. Thus magnitude, by developing in the procession of imagination, dragged along with itself the smallness of matter, made it seem large by extending it along with itself, without becoming filled by that extension. The magnitude of matter is a false magnitude, since matter does not by itself possess magnitude, and by extending itself along with magnitude, has shared the extension of the latter. Indeed as all intelligible beings are reflected, either in other things in general, or in one of them in particular, as each of them was large, the totality also is, in this manner, great (?). Thus the magnitude of each reason constituted a particular magnitude, as, for instance, a horse, or some other being.[82] The image formed by the universal reflection of intelligible beings became a magnitude, because it was illuminated by magnitude itself. Every part of it became a special magnitude; and all things together seemed great by virtue of the universal form to which magnitude belongs. Thus occurred the extension of each thing towards each of the others, and towards their totality. The amount of this extension in form and in mass necessarily depended on the power, that transformed what in reality was nothing to an appearance of being all things. In the same manner color, that arose out of what is not color, and quality, that arose out of what is not quality, here below were referred to by the same name as the intelligible entities (of which they are the images). The case is similar for magnitude, which arose out of that which has none, or at least out of that magnitude that bears the same name (as intelligible magnitude).