Letters 40.6

No; but just as you are well satisfied, in the majority of cases, to have seen through tricks which you did not think could possibly be done, so in the case of these word-gymnasts,—to have heard them once is amply sufficient. For what can a man desire to learn or to imitate in them? What is he to think of their souls, when their speech is sent into the charge in utter disorder, and cannot be kept in hand?

Seneca, Letters to Lucilius 40.6, translated by Richard Mott Gummere