Apuleius, The Apologia and Florida of Apuleius of Madaura
“ What is more readily come by than madness of speech and worthlessness of character? The former springs from contempt of others, the latter from contempt of self. For to show little care for one's own character is self-contempt, while to attack others with uncouth and savage speech is an insult to those that hear you. For is it not the height of insolence, think you, that a man should deem you to rejoice in hearing abuse of the best of men, and should believe that you do not understand evil and wicked words, or, if you do understand them, hold them to be good? ”
