One body is said to divide another, by penetrating it. This assertion, however, demands demonstration, for it is more reasonable to suppose that qualities may penetrate a body without dividing it. Such demonstration is attempted by the claim that qualities are incorporeal.[63] But if matter itself be as incorporeal as the qualities, why could not some qualities along with the matter penetrate into some other body? That some solids do not penetrate other bodies, is due to their possession of qualities incompatible with that of penetration. The objection that many qualities could not, along with matter, penetrate some body, would be justified only if it were the multitude of qualities that produced density; but if density be as much of a quality as corporeity, the qualities will constitute the mixture not in themselves alone, but only as they happen to be determined. On the other hand, when matter does not lend itself to mixture, this occurs not by virtue of its being matter, but as matter united to some determinative quality. That is all the truer as matter is receptive to any magnitude, not having any of its own. But enough of this. THE BODY IS RATIONALIZED MATTER. 3. Since we have spoken of corporeity, it must be analyzed. Is it a composite of all qualities, or does it constitute a form, a "reason," which produces the body by presence in matter? If the body be the composite of all the qualities together with matter, this totality of qualities will constitute corporeity. But if corporeity be a reason which produces the body by approaching matter, doubtless it is a reason which contains all the qualities. Now, if this reason be not at all a definition of being, if it be a reason productive of the object, it will not contain any matter. It is the reason which applies itself to matter, and which, by its presence, produces the body there. Body is matter with indwelling "reason." This "reason," being a form, may be considered separately from matter, even if it were entirely inseparable therefrom. Indeed, "reason" separated (from matter), and residing in intelligence, is different (from "reason" united to matter); the "Reason" which abides within Intelligence is Intelligence itself. But this subject (I shall) refer to elsewhere.[64] SIXTH ENNEAD, BOOK SEVEN. How Ideas Multiplied, and the Good.[65] A. HOW IDEAS MULTIPLY. THE EYES WERE IMPLANTED IN MAN BY DIVINE FORESIGHT. 1. When the (higher) Divinity, or (some lower) divinity,[66] sent souls down into generation, He gave to the face of man eyes suitable to enlighten him,[67] and placed in the body the other organs suited to the senses, foreseeing that (a living organism) would be able to preserve itself only on condition of seeing, hearing and touching contiguous objects, to enable it to select some, and to avoid others. SENSES NOT GIVEN TO MAN BECAUSE OF EXPERIENCE OF MISFORTUNES.