Enchiridion

by Epictetus

It is not necessary to go to the theaters often: but if there is ever a proper occasion for going, do not show yourself as being a partisan of any man except yourself, that is, desire only that to be done which is done, and for him only to gain the prize who gains the prize; for in this way you will meet with no hindrance. But abstain entirely from shouts and laughter at any (thing or person), or violent emotions. And when you are come away, do not talk much about what has passed on the stage, except about that which may lead to your own improvement. For it is plain, if you do talk much that you admired the spectacle (more than you ought).14

XXXV. Quarreling and contention are everywhere foolish, and particularly in talk over wine they are unbecoming: for a man who is drunk could not teach a man who is sober, nor on the other hand could a drunken man be convinced by a sober man. But where there is no sobriety, it will appear that to no purpose have you labored for the result of persuasion.