Seneca · On the writings of Fabianus
Letters 100.2
Fabianus seems to me to have not so much an “efflux” as a “flow” of words: so copious is it, without confusion, and yet not without speed. This is indeed what his style declares and announces—that he has not spent a long time in working his matter over and twisting it into shape. But even supposing the facts are as you would have them; the man was building up character rather than words, and was writing those words for the mind rather than for the ear.
Seneca, Letters to Lucilius 100.2, translated by Richard Mott Gummere