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He has heard from priests and priestesses, and from the poet Pindar, of an immortal soul which is born again and again in successive periods of existence, returning into this world when she has paid the penalty of ancient crime, and, having wandered over all places of the upper and under world, and seen and known all things at one time or other, is by association out of one thing capable of recovering all. For nature is of one kindred; and every soul has a seed or germ which may be developed into all knowledge. The existence of this latent knowledge is further proved by the interrogation of one of Meno’s slaves, who, in the skilful hands of Socrates, is made to acknowledge some elementary relations of geometrical figures. The theorem that the square of the diagonal is double the square of the side–that famous discovery of primitive mathematics, in honour of which the legendary Pythagoras is said to have sacrificed a hecatomb–is elicited from him. The first step in the process of teaching has made him conscious of his own ignorance. He has had the ‘torpedo’s shock’ given him, and is the better for the operation. But whence had the uneducated man this knowledge? He had never learnt geometry in this world; nor was it born with him; he must therefore have had it when he was not a man. And as he always either was or was not a man, he must have always had it. (Compare Phaedo.)

After Socrates has given this specimen of the true nature of teaching, the original question of the teachableness of virtue is renewed. Again he professes a desire to know ‘what virtue is’ first. But he is willing to argue the question, as mathematicians say, under an hypothesis. He will assume that if virtue is knowledge, then virtue can be taught. (This was the stage of the argument at which the Protagoras concluded.)

Socrates has no difficulty in showing that virtue is a good, and that goods, whether of body or mind, must be under the direction of knowledge. Upon the assumption just made, then, virtue is teachable. But where are the teachers? There are none to be found. This is extremely discouraging. Virtue is no sooner discovered to be teachable, than the discovery follows that it is not taught. Virtue, therefore, is and is not teachable.

In this dilemma an appeal is made to Anytus, a respectable and well-to-do citizen of the old school, and a family friend of Meno, who happens to be present. He is asked ‘whether Meno shall go to the Sophists and be taught.’ The suggestion throws him into a rage. ‘To whom, then, shall Meno go?’ asks Socrates. To any Athenian gentleman–to the great Athenian statesmen of past times. Socrates replies here, as elsewhere (Laches, Prot.), that Themistocles, Pericles, and other great men, had sons to whom they would surely, if they could have done so, have imparted their own political wisdom; but no one ever heard that these sons of theirs were remarkable for anything except riding and wrestling and similar accomplishments. Anytus is angry at the imputation which is cast on his favourite statesmen, and on a class to which he supposes himself to belong; he breaks off with a significant hint. The mention of another opportunity of talking with him, and the suggestion that Meno may do the Athenian people a service by pacifying him, are evident allusions to the trial of Socrates.

Socrates returns to the consideration of the question ‘whether virtue is teachable,’ which was denied on the ground that there are no teachers of it: (for the Sophists are bad teachers, and the rest of the world do not profess to teach). But there is another point which we failed to observe, and in which Gorgias has never instructed Meno, nor Prodicus Socrates. This is the nature of right opinion. For virtue may be under the guidance of right opinion as well as of knowledge; and right opinion is for practical purposes as good as knowledge, but is incapable of being taught, and is also liable, like the images of Daedalus, to ‘walk off,’ because not bound by the tie of the cause. This is the sort of instinct which is possessed by statesmen, who are not wise or knowing persons, but only inspired or divine. The higher virtue, which is identical with knowledge, is an ideal only. If the statesman had this knowledge, and could teach what he knew, he would be like Tiresias in the world below,–‘he alone has wisdom, but the rest flit like shadows.’