If someone speaks badly of you, do not defend yourself against the accusations, but reply; "you obviously don't know about my other vices, otherwise you would have mentioned these as well
EpictetusIt was the first and most striking characteristic of Socrates never to become heated in discourse, never to utter an injurious or insulting word -- on the contrary, he persistently bore insult from others and thus put an end to the fray.
Epictetus