Plato, says he, writes that horses are in vain by us esteemed horses, and men men. And in which of Plato’s commentaries has he found this hidden? For as to us, we read in all his books, that horses are horses, that men are men, and that fire is by him esteemed fire, because he holds that every one of these things is sensible and subject to opinion. But this fine fellow Colotes, as if he were not a hair’s breadth removed from perfect wisdom, apprehends it to be one and the same thing to say, Man is not and Man is a non ens.
Now to Plato there seems to be a wonderful great difference between not being at all and being a non ens; because the first imports an annihilation and abolishment of all substance, and the other shows the diversity there is between that which is participated and that which participates. Which diversity those who came after distinguished only into the difference of genus and species, and certain common and proper qualities or accidents, as they are called, but ascended no higher, falling into more logical doubts and difficulties. Now there is the same proportion between that which is participated and that which participates, as there is between the cause and the matter, the original and the image, the faculty and the effect. Wherein that which is by itself and always the same principally differs from that which is by another and never abides in one and the same manner; because the one never was nor ever shall be non-existent, and is therefore totally and essentially an ens; but to the other that very being, which it has not of itself but happens to take by participation from another, does not remain firm and constant, but it goes out of it by its imbecility, — the matter always gliding and sliding about the form, and receiving several affections and changes in the image of the substance, so that it is continually moving and shaking. As therefore he who says that the image of Plato is not Plato takes not away the sense and substance of the image, but shows the difference of that which exists of itself from that which exists only in regard to some other; so neither do they take away the nature, use, or sense of men, who affirm that every one of us, by participating in a certain common substance, that is, by the idea, is become the image of that which afforded the likeness for our generation. For neither does he who says that a red-hot iron is not fire, or that the moon is not the sun, but, as Parmenides has it, A torch which round the earth by night Does bear about a borrowed light, take away therefore the use of iron, or the nature of the moon. But if he should deny it to be a body, or affirm that it is not illuminated, he would then contradict the senses, as one who admitted neither body, animal, generation, nor sense. But he who by his opinion imagines that these things subsist only by participation, and considers how far remote and distant they are from that which always is and which communicates to them their being, does not reject the sensible, but affirms that the intelligible is; nor does he take away and abolish the effects which are wrought and appear in us; but he shows to those who follow him that there are other things, firmer and more stable than these in respect of their essence, because they are neither engendered, nor perish, nor suffer any thing; and he teaches them, more purely touching the difference, to express it by names, calling these ὄντα or entia (things that have being), and those γιγνόμενα or fientia (things engendered). And the same also usually befalls the moderns; for they deprive many — and those great things — of the appellation of ens or being; such as are voidness, time, place, and simply the entire genus of things spoken, in which are comprised all things true. For these things, they say, are not entia but some things; and they perpetually make use of them in their lives and in their philosophy, as of things having subsistence and existence.