Seneca · On the proper style for a philosopher's discourse
Letters 40.9
You will be acting rightly, therefore, if you do not regard those men who seek how much they may say, rather than how they shall say it, and if for yourself you choose, provided a choice must be made, to speak as Publius Vinicius the stammerer does. When Asellius was asked how Vinicius spoke, he replied: “Gradually” ! (It was a remark of Geminus Varius, by the way: “I don’t see how you can call that man ‘eloquent’; why, he can’t get out three words together.”) Why, then, should you not choose to speak as Vinicius does?
Seneca, Letters to Lucilius 40.9, translated by Richard Mott Gummere