Plotinos · Plotinus
IF VIRTUE WERE CORPOREAL IT WOULD BE PERISHABLE.
Are the notions of virtue, and other intelligible entities by the soul thought eternal, or does virtue arise and perish? If so, by what being, and how will it be formed? It is the same problem that remains to be solved. Intelligible entities must therefore be eternal and immutable, like geometrical notions, and consequently cannot be corporeal. Further, the subject in whom they exist must be of a nature similar to theirs, and therefore not be corporeal; for the nature of body is not to remain immutable, but to be in a perpetual flow. BODIES ARE ACTIVE ONLY BY MEANS OF INCORPOREAL POWERS. (9.) There are men who locate the soul in the body, so as to give her a foundation in some sphere of activity, to account for the various phenomena in the body, such as getting hot or cold, pushing on or stopping, (and the like). They evidently do not realize that bodies produce these effects only through incorporeal powers, and that those are not the powers that we attribute to the soul, which are thought, sensation, reasoning, desire, judiciousness, propriety and wisdom, all of them entities that cannot possible be attributes of a corporeal entity. Consequently, those (materialists) attribute to the body all the faculties of incorporeal essences, and leave nothing for the latter.
Text from Project Gutenberg, public domain in the United States.