Diogenes was neither an Attic nor a Dorian, nor tutored in the schools of Salon or Lycurgus, for neither places nor laws communicate virtue. He was born in the town of Synope, at the bottom of Pontus Euxinus. When he had consulted Apollo, he forsook all the occasions of grief and trouble, he delivered himself from his fetters, and like a wise and free bird, passed through the world without fearing the tyrants, without binding himself to any particular laws, without applying himself to the administration of public affairs, without being troubled in the education of children, without being encumbered by matrimony, without toiling himself with the cultivating of the ground, without engaging himself in the carrying out of war, without trafficking merchandise by sea or land; for he laughed at all these sorts of men, and at their several stations of life as we commonly laugh at children who we observe so intent to play with trifles, until they often fight and hurt one another.

He led the life of an independent, being free from fears and anxieties. In winter seasons he did not by long fatiguing journeys approach the Babylonians, nor in the summer the Medes; but according to the season, and from the Isthmus, according to the season, and from the Isthmus to Attica again. His royal palaces were the temples, the colleges, and the sacred woods. His riches very large and secure, and not being circumscribed, were not easily subject to ambushes, they being the whole earth with all the fruits it bore, and the fountains that it affords, more excellent than the wines of Lesbos and Chios. He habituated himself also to all sorts of weather as lions do, and would not avoid the changing of the seasons, appointed by Jupiter; neither did he consider any means to secure himself from them; but accustomed himself in such a manner to all seasons, by this kind of living, so that he secured this health and strength, without any assistance from medicine, without experiencing the sharpness of the scalpel or cautery, without imploring the help of Chiron, or of Esculapius or Asclepiades, and without submitting to the prophecies of soothsayers, or to magical and superstitious purifications, or to the vanity of conjurations. At the same time that all Greece was in arms and uproar, and all the neighboring nations were at war with one another, he alone experienced it as if it were a truce with all the earth, and having overcome fighting, was without arms in the midst of armed men. Nay, even the basest of men, the tyrants and his very slanderers, had a respect for him and would not in the least hurt him, though he reproved them, objecting and lampooning their actions before their very eyes, which is a very safe and very convenient way of reproach – reminding men of peace and reason.

- Maximum of Tyre