The term “Cynic” itself derives from the Greek word κυνικός, kynikos, “dog-like” and that from κύων, kyôn, “dog” (genitive: kynos).One explanation offered in ancient times for why the Cynics were called dogs was because Antisthenes taught in the Cynosarges gymnasium at Athens. The word Cynosarges means the place of the white dog. Later Cynics also sought to turn the word to their advantage, as a later commentator explained:
There are four reasons why the Cynics are so named. First because of the indifference of their way of life, for they make a cult of indifference and, like dogs, eat and make love in public, go barefoot, and sleep in tubs and at crossroads. The second reason is that the dog is a shameless animal, and they make a cult of shamelessness, not as being beneath modesty, but as superior to it. The third reason is that the dog is a good guard, and they guard the tenets of their philosophy. The fourth reason is that the dog is a discriminating animal which can distinguish between its friends and enemies. So do they recognize as friends those who are suited to philosophy, and receive them kindly, while those unfitted they drive away, like dogs, by barking at them
and this:
Many anecdotes of [Greek philosopher] Diogenes refer to his dog-like behavior, and his praise of a dog’s virtues. It is not known whether Diogenes was insulted with the epithet “doggish” and made a virtue of it, or whether he first took up the dog theme himself. The modern terms cynic and cynical derive from the Greek word kynikos, the adjective form of kyon (κύων), meaning dog. Diogenes believed human beings live artificially and hypocritically and would do well to study the dog. Besides performing natural bodily functions in public without unease, a dog will eat anything, and make no fuss about where to sleep. Dogs live in the present without anxiety, and have no use for the pretensions of abstract philosophy. In addition to these virtues, dogs are thought to know instinctively who is friend and who is foe. Unlike human beings who either dupe others or are duped, dogs will give an honest bark at the truth. Diogenes stated that “other dogs bite their enemies, I bite my friends to save them.”
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