Plato Euthydemus 304

Now, in so far as your accomplishment can be quickly imparted, 304a it is excellent; but for public discussions it is not suitable: if I may advise you, beware of talking before a number of people, lest they learn the whole thing in a trice and give you no credit for it. The best thing for you is to talk to each other by yourselves, in private; failing that, if a third person is present, it must be someone who will pay you a good fee. And if you are prudent 304b you will give this same counsel to your pupils also—that they are never to converse with anybody except you and each other. For it is the rare, Euthydemus, that is precious, while water is cheapest, though best, as Pindar ¹ said. But come, I said, see if you can admit both me and Cleinias here to your class.
  This, Crito, was our conversation, and after exchanging a few more words we went off. Now you must arrange to join us in taking lessons from the pair; 304c for they say they are able to teach anyone who is willing to pay good money, and that no sort of character or age—and it is well that you especially should be told that they promise that their art is no hindrance to money-making—need deter anyone from an easy acquisition of their wisdom.

Indeed, Socrates, I love listening, and would be glad to learn from them; but I am afraid I am one of the sort who are not like Euthydemus, but who, as you described them just now, would prefer being refuted 304d to refuting with such arguments. Now, although I feel it is absurd to admonish you, I wish nevertheless to report to you what was told me just now. Do you know, one of the people who had left your discussion came up to me as I was taking a stroll—a man who thinks himself very wise, one of those who are so clever at turning out speeches for the law-courts ² —and said: Crito, do you take no lessons from these wise men? No, in truth, I replied: there was such a crowd that, though I stood quite close, I was unable to catch what was said. Well, let me tell you, he said, it was something worth hearing. 304e What was it? I asked. You would have heard the disputation of men who are the most accomplished of our day in that kind of speaking. To this I replied: Well, what did they show forth to you? Merely the sort of stuff, he said, that you may hear such people babbling about at any time—making an inconsequent ado about matters of no consequence (in some such parlance he expressed himself). Whereupon—Well, all the same, I said, philosophy is a charming thing.