Plutarch Adversus Coloten 13

[13] But because Colotes would, immediately after Democritus, seem to inter and bury Parmenides, and I have passed over and a little postponed his defence, to bring in between them that of Empedocles, as seeming to be more coherent and consequent to the first reprehensions, let us now return to Parmenides. Him then does Colotes accuse of having broached and set abroad certain shameful and villanous sophistries; and yet by these his sophisms he has neither rendered friendship less honorable, nor voluptuousness or the desire of pleasures more audacious and unbridled. He has not taken from honesty its attractive property or its being venerable or recommendable of itself, nor has he disturbed the opinions we ought to have of the Gods. And I do not see how, by saying that the All (or the universe) is one, he hinders or obstructs our living. For when Epicurus himself says that the All is infinite, that it is neither engendered nor perishable, that it can neither increase nor be diminished, he speaks of the universe as of one only thing. And having in the beginning of his treatise concerning this matter said, that the nature of those things which have being consists of bodies and of voidness, he makes a division (as it were) of one thing into two parts, one of which has in reality no subsistence, being, as you yourselves term it, impalpable, void, and incorporeal; so that by this means, even with you also, all comes to be one; unless you desire, in speaking of voidness, to use words void of sense, and to combat the ancients, as if you were fighting against a shadow. But these atomical bodies, you will say, are, according to the opinion of Epicurus, infinite in number, and every thing which appears to us is composed of them. See now, therefore, what principles of generation you suppose, infinity and voidness; one of which, to wit, voidness, is inactive, impassible, and incorporeal; the other, to wit, infinity, is disorderly, unreasonable, and incomprehensible, dissolving and confounding itself, because it cannot for its multitude be contained, circumscribed, or limited. But Parmenides has neither taken away fire, nor water, nor rocks and precipices, nor yet cities (as Colotes says) which are built and inhabited as well in Europe as in Asia; since he has both made an order of the world, and mixing the elements, to wit, light and dark, does of them and by them compose and finish all things that are to be seen in the world. For he has written very largely of the earth, heaven, sun, moon, and stars, and has spoken of the generation of man; and being, as he was, an ancient author in physiology, and one who in writing sought to deliver his own and not to destroy another’s doctrine, he has passed over none of the principal things in Nature. Moreover, Plato, and before him Socrates himself, understood that in Nature there is one part subject to opinion, and another subject to intelligence. As for that which is subject to opinion, it is always unconstant, wandering, and carried away with several passions and changes, liable to diminution and increase, and to be variously disposed to various men, and not always appearing after one manner even to the same person. But as to the intelligible part, it is quite of another kind, as himself says, always like to itself, and perdurable in its being.

Here Colotes, sycophant-like, catching at his expressions and drawing the discourse from things to words, flatly affirms that Parmenides in one word takes away the existence of all things by supposing ens (or that which is) to be one. But, on the contrary, he takes away neither the one nor the other part of Nature; but rendering to each of them what belongs to it and is convenient for it, he places the intelligible in the idea of one and of that which is, calling it ens because it is eternal and incorruptible, and one because it is always like itself and admits no diversity. And as for that part which is sensible, he places it in the rank of uncertain, disorderly, and always moving. Of which two parts, we may see the distinct judgment: as regarding that which is intelligible, and always alike and of the same sort; because it is conversant in things which receive all sorts of changes, passions, and inequalities. Now how he could have left sense and opinion, if he had not also left any thing sensible and opinable, it is impossible for any man to say. But because to that which truly is it appertains to continue in its being, and because sensible things sometimes are, sometimes are not, continually passing from one being to another and perpetually changing their state, he thought they required some other name than that of entia, or things which always are. This speech therefore concerning ens (or that which is), that it should be but one, is not to take away the plurality of sensible things, but to show how they differ from that which is intelligible. Which difference Plato in his discourse of Ideas more fully declaring, has thereby afforded Colotes an opportunity of cavilling.