trans. Jowett (1871)
And this is prudence in affairs private as well as public; he will learn to order his own house in the best manner, and he will be able to speak and act for the best in the affairs of the state.
Do I understand you, I said; and is your meaning that you teach the art of politics, and that you promise to make men good citizens?
That, Socrates, is exactly the profession which I make.
Then, I said, you do indeed possess a noble art, if there is no mistake about this; for I will freely confess to you, Protagoras, that I have a doubt whether this art is capable of being taught, and yet I know not how to disbelieve your assertion. And I ought to tell you why I am of opinion that this art cannot be taught or communicated by man to man. I say that the Athenians are an understanding people, and indeed they are esteemed to be such by the other Hellenes. Now I observe that when we are met together in the assembly, and the matter in hand relates to building, the builders are summoned as advisers; when the question is one of shipbuilding, then the ship-wrights; and the like of other arts which they think capable of being taught and learned. And if some person offers to give them advice who is not supposed by them to have any skill in the art, even though he be good-looking, and rich, and noble, they will not listen to him, but laugh and hoot at him, until either he is clamoured down and retires of himself; or if he persist, he is dragged away or put out by the constables at the command of the prytanes. This is their way of behaving about professors of the arts. But when the question is an affair of state, then everybody is free to have a say-carpenter, tinker, cobbler, sailor, passenger; rich and poor, high and low-any one who likes gets up, and no one reproaches him, as in the former case, with not having learned, and having no teacher, and yet giving advice; evidently because they are under the impression that this sort of knowledge cannot be taught. And not only is this true of the state, but of individuals; the best and wisest of our citizens are unable to impart their political wisdom to others:
Compare W.R. Lamb’s 1924 translation at the Perseus Project (Greek text and commentary also available).