those subjects was quite useless; as Plato also records in the Euthydemus. XIII. And when Charmidas offered him some slaves, with the view to his making a profit of them, he would not have them; and, as some people say, he paid no regard to the beauty of Alcibiades. XIV. He used to praise leisure as the most valuable of possessions, as Xenophon tells us in his Banquet. And it was a saying of his that there was one only good, namely, knowledge; and one only evil, namely, ignorance; that riches and high birth had nothing estimable in them, but that, on the contrary, they were wholly evil. Accordingly, when some one told him that the mother of Antisthenes was a Thracian woman, “Did you suppose,” said he, “that so noble a man must be born of two Athenians?” And when Phædo was reduced to a state of slavery, he ordered Crito to ransom him, and taught him, and made him a philosopher. XV. And, moreover, he used to learn to play on the lyre when he had time, saying, that it was not absurd to learn anything that one did not know; and further, he used frequently to dance, thinking such an exercise good for the health of the body, as Xenophon relates in his Banquet. XVI. He used also to say that the dæmon foretold the future to him;[21] and that to begin well was not a trifling thing, but yet not far from a trifling thing; and that he knew nothing, except the fact of his ignorance. Another saying of his was, that those who bought things out of season, at an extravagant price, expected never to live till the proper season for them. Once, when he was asked what was the virtue of a young man, he said, “To avoid excess in everything.” And he used to say, that it was necessary to learn geometry only so far as might enable a man to measure land for the purposes of buying and selling. And when Euripides, in his Auge, had spoken thus of virtue:— ’Tis best to leave these subjects undisturbed;