Discourses, "Of Disputation or Discussion" (§2)

“Now this was the first and chief peculiarity of Socrates, never to be irritated in argument, never to utter anything abusive, anything insulting, but to bear with abusive persons and to put an end to the quarrel. If you would know what great power he had in this way, read the Symposium of Xenophon, and you will see how many quarrels he put an end to. Hence with good reason in the poets also this power is most highly praised:”