Soc. Clearly anybody can recognize the art I mean; for I am confident that all men who have any intellect whatsoever believe that the knowledge which has to do with being, reality, and eternal immutability is the truest kind of knowledge. What do you think, Protarchus?

Pro. I have often heard Gorgias constantly maintain that the art of persuasion surpasses all others for this, he said, makes all things subject to itself, not by force, but by their free will, and is by far the best of all arts; so now I hardly like to oppose either him or you.

Soc. It seems to me that you wanted to speak and threw down your arms out of modesty.

Pro. Very well; have it as you like.

Soc. Is it my fault that you have misunderstood?

Pro. Misunderstood what?

Soc. My question, dear Protarchus, was not as yet what art or science surpasses all others by being the greatest and best and most useful to us: what I am trying to find out at present is which art, however little and of little use, has the greatest regard for clearness, exactness, and truth. See; you will not make Gorgias angry if you grant that his art is superior for the practical needs of men, but say that the study of which I spoke is superior in the matter of the most perfect truth, just as I said in speaking about the white that if it was small and pure it was superior to that which was great but impure. Now, therefore, with careful thought and due consideration, paying attention neither to the usefulness nor to the reputation of any arts or sciences, but to that faculty of our souls, if such there be, which by its nature loves the truth and does all things for the sake of the truth, let us examine this faculty and say whether it is most likely to possess mind and intelligence in the greatest purity, or we must look for some other faculty which has more valid claims.

Pro. I am considering, and I think it is difficult to concede that any other science or art cleaves more closely to truth than this.

Soc. In saying that, did you bear in mind that the arts in general, and the men who devote themselves to them, make use of opinion and persistently investigate things which have to do with opinion? And even if they think they are studying nature, they are spending their lives in the study of the things of this world, the manner of their production, their action, and the forces to which they are subjected. Is not that true?

Pro. Yes, it is.

Soc. Such thinkers, then, toil to discover, not eternal verities, but transient productions of the present, the future, or the past?

Pro. Perfectly true.

Soc. And can we say that any of these things becomes certain, if tested by the touchstone of strictest truth, since none of them ever was, will be, or is in the same state?

Pro. Of course not.

Soc. How can we gain anything fixed whatsoever about things which have no fixedness whatsoever?

Pro. In no way, as it seems to me.

Soc. Then no mind or science which is occupied with them possesses the most perfect truth.

Pro. No, it naturally does not.

Soc. Then we must dismiss the thought of you and me and Gorgias and Philebus, and make this solemn declaration on the part of our argument.

Pro. What is the solemn declaration?

Soc. That fixed and pure and true and what we call unalloyed knowledge has to do with the things which are eternally the same without change or mixture, or with that which is most akin to them; and all other things are to be regarded as secondary and inferior.

Pro. Very true.

Soc. And of the names applied to such matters, it would be fairest to give the finest names to the finest things, would it not?

Pro. That is reasonable.