Then when I undertook to attach the verb to be to not-being
I was contradicting what I said before.
Evidently.
Well, then; when I attached this verb to it, did I not address it in the singular?
Yes.
And when I called it irrational, inexpressible, and unspeakable, I addressed my speech to it as singular.
Of course you did.
But we say that, if one is to speak correctly, one must not define it as either singular or plural, and must not even call it it at all; for even by this manner of referring to it one would be giving it the form of the singular.
Certainly.
But poor me, what can anyone say of me any longer? For you would find me now, as always before, defeated in the refutation of not-being. So, as I said before, we must not look to me for correctness of speech about not-being. But come now, let us look to you for it.
What do you mean?
Come, I beg of you, make a sturdy effort, young man as you are, and try with might and main to say something correctly about not-being, without attributing to it either existence or unity or plurality.
But I should be possessed of great and absurd eagerness for the attempt, if I were to undertake it with your experience before my eyes.
Well, if you like, let us say no more of you and me; but until we find someone who can accomplish this, let us confess that the sophist has in most rascally fashion hidden himself in a place we cannot explore.
That seems to be decidedly the case.
And so, if we say he has an art, as it were, of making appearances,
he will easily take advantage of our poverty of terms to make a counter attack, twisting our words to the opposite meaning; when we call him an image-maker, he will ask us what we mean by image, exactly. So, Theaetetus, we must see what reply is to be made to the young man’s question.
Obviously we shall reply that we mean the images in water and in mirrors, and those in paintings, too, and sculptures, and all the other things of the same sort.
It is evident, Theaetetus, that you never saw a sophist.
Why?
He will make you think his eyes are shut or he has none at all.