I might speak of the frugality of Pythagoras, Socrates, and Antisthenes to our confusion: but it would be tedious, and would require a work to itself. At all events this is the Antisthenes who, after teaching rhetoric with renown, on hearing Socrates, is related to have said to his disciples, “Go, and seek a master, for I have now found one.” He immediately, sold what he had, divided the proceeds among the people, and kept nothing for himself but a small cloak. Of his poverty and toil Xenophon in the Symposium is a witness, and so are his countless treatises, some philosophical, some rhetorical. His most famous follower was the great Diogenes, who was mightier than King Alexander in that he conquered human nature. For Antisthenes would not take a single pupil, and when he could not get rid of the persistent Diogenes he threatened him with a stick if he did not depart. The latter is said to have laid down his head and said, “No stick will be hard enough to prevent me from following you.”
Source: Translated by W.H. Fremantle, G. Lewis and W.G. Martley. From Nicene and Post-Nicene Fathers, Second Series, Vol. 6. Edited by Philip Schaff and Henry Wace.