Seneca · On style as a mirror of character
Letters 114.7
These words of his, put together so faultily, thrown off so carelessly, and arranged in such marked contrast to the usual practice, declare that the character of their writer was equally unusual, unsound, and eccentric. To be sure, we bestow upon him the highest praise for his humanity; he was sparing with the sword and refrained from bloodshed; and he made a show of his power only in the course of his loose living; but he spoiled, by such preposterous finickiness of style, this genuine praise, which was his due.
Seneca, Letters to Lucilius 114.7, translated by Richard Mott Gummere