70:8.16

He used to affirm that training was of two kinds, mental and bodily: the latter being that whereby, with constant exercise, perceptions are formed such as secure freedom of movement for virtuous deeds; and the one half of this training is incomplete without the other, good health and strength being just as much included among the essential things, whether for body or soul. And he would adduce indisputable evidence to show how easily from gymnastic training we arrive at virtue. For in the manual crafts and other arts it can be seen that the craftsmen develop extraordinary manual skill through practice. Again, take the case of flute-players and of athletes: what surpassing skill they acquire by their own incessant toil; and, if they had transferred their efforts to the training of the mind, how certainly their labours would not have been unprofitable or ineffective.

And he said he marvelled that before we buy a jar or dish we try whether it rings true, but if it is a man are content merely to look at him. To Xeniades who purchased him he said, "You must obey me, although I am a slave; for, if a physician or a steersman were in slavery, he would be obeyed." Eubulus in his book entitled The Sale of Diogenes tells us that this was how he trained the sons of Xeniades. After their other studies he taught them to ride, to shoot with the bow, to sling stones and to hurl javelins. Later, when they reached the wrestling-school, he would not permit the master to give them full athletic training, but only so much as to heighten their colour and keep them in good condition.

Wisdom is a most sure stronghold which never crumbles away nor is betrayed. Walls of defence must be constructed in our own impregnable reasonings. He used to converse in the gymnasium of Cynosarges (White hound) at no great distance from the gates, and some think that the Cynic school derived its name from Cynosarges. Antisthenes himself too was nicknamed a hound pure and simple. And he was the first, Diocles tells us, to double his cloak and be content with that one garment and to take up a staff and a wallet. Neanthes too asserts that he was the first to double his mantle. Sosicrates, however, in the third book of his Successions of Philosophers says this was first done by Diodorus of Aspendus, who also let his beard grow and used a staff and a wallet.