Wikiquote:Transwiki/Anecdotes about Diogenes preserved by Augustine

"It is this which those canine or Cynic philosophers have overlooked, when they have, in violation of the modest instincts of men, boastfully proclaimed their unclean and shameless opinion, worthy indeed of dogs, viz., that as the matrimonial act is legitimate, no one should be ashamed to perform it openly, in the street or in any public place. Instinctive shame has overborne this wild fancy. For though it is related that Diogenes once dared to put his opinion in practice, under the impression that his sect would be all the more famous if his egregious shamelessness were deeply graven in the memory of mankind, yet this example was not afterwards followed. Shame had more influence with them, to make them blush before men, than error to make them affect a resemblance to dogs. And possibly, even in the case of Diogenes, and those who did imitate him, there was but an appearance and pretence of copulation, and not the reality."

- Augustine, De Civitate Dei, xiv. 20