When he heard me say this, he replied: No other inference, Socrates, can be drawn from your words.
I proceeded: Is not a Sophist, Hippocrates, one who deals wholesale or retail in the food of the soul? To me that appears to be his nature.
And what, Socrates, is the food of the soul?
Surely, I said, knowledge is the food of the soul; and we must take care, my friend, that the Sophist does not deceive us when he praises what he sells, like the dealers wholesale or retail who sell the food of the body; for they praise indiscriminately all their goods, without knowing what are really beneficial or hurtful: neither do their customers know, with the exception of any trainer or physician who may happen to buy of them. In like manner those who carry about the wares of knowledge, and make the round of the cities, and sell or retail them to any customer who is in want of them, praise them all alike; though I should not wonder, O my friend, if many of them were really ignorant of their effect upon the soul; and their customers equally ignorant, unless he who buys of them happens to be a physician of the soul. If, therefore, you have understanding of what is good and evil, you may safely buy knowledge of Protagoras or of anyone; but if not, then, O my friend, pause, and do not hazard your dearest interests at a game of chance. For there is far greater peril in buying knowledge than in buying meat and drink: the one you purchase of the wholesale or retail dealer, and carry them away in other vessels, and before you receive them into the body as food, you may deposit them at home and call in any experienced friend who knows what is good to be eaten or drunken, and whatnot, and how much, and when; and then the danger of purchasing them is not so great. But you cannot buy the wares of knowledge and carry them away in another vessel; when you have paid for them you must receive them into the soul and go your way, either greatly harmed or greatly benefited; and therefore we should deliberate and take counsel with our elders; for we are still young—too young to determine such a matter. And now let us go, as we were intending, and hear Protagoras; and when we have heard what he has to say, we may take counsel of others; for not only is Protagoras at the house of Callias, but there is Hippias of Elis, and, if I am not mistaken, Prodicus of Ceos, and several other wise men.
To this we agreed, and proceeded on our way until we reached the vestibule of the house; and there we stopped in order to conclude a discussion which had arisen between us as we were going along; and we stood talking in the vestibule until we had finished and come to an understanding. And I think that the doorkeeper, who was a eunuch, and who was probably annoyed at the great inroad of the Sophists, must have heard us talking. At any rate, when we knocked at the door, and he opened and saw us, he grumbled: They are Sophists—he is not at home; and instantly gave the door a hearty bang with both his hands. Again we knocked, and he answered without opening: Did you not hear me say that he is not at home, fellows? But, my friend, I said, you need not be alarmed; for we are not Sophists, and we are not come to see Callias, but we want to see Protagoras; and I must request you to announce us. At last, after a good deal of difficulty, the man was persuaded to open the door.
When we entered, we found Protagoras taking a walk in the cloister; and next to him, on one side, were walking Callias, the son of Hipponicus, and Paralus, the son of Pericles, who, by the mother’s side, is his half-brother, and Charmides, the son of Glaucon. On the other side of him were Xanthippus, the other son of Pericles, Philippides, the son of Philomelus; also Antimoerus of Mende, who of all the disciples of Protagoras is the most famous, and intends to make sophistry his profession. A train of listeners followed him; the greater part of them appeared to be foreigners, whom Protagoras had brought with him out of the various cities visited by him in his journeys, he, like Orpheus, attracting them his voice, and they following.12 I should mention also that there were some Athenians in the company. Nothing delighted me more than the precision of their movements: they never got into his way at all; but when he and those who were with him turned back, then the band of listeners parted regularly on either side; he was always in front, and they wheeled round and took their places behind him in perfect order.
After him, as Homer says,13 “I lifted up my eyes and saw” Hippias the Elean sitting in the opposite cloister on a chair of state, and around him were seated on benches Eryximachus, the son of Acumenus, and Phaedrus the Myrrhinusian, and Andron the son of Androtion, and there were strangers whom he had brought with
