Seneca,
Moral letters to Lucilius — Letter 40…
“ Let philosophy possess great forces, but kept well under control; let her stream flow unceasingly, but never become a torrent. And I should hardly allow even to an orator a rapidity of speech like this, which cannot be called back, which goes lawlessly ahead; for how could it be followed by jurors, who are often inexperienced and untrained? Even when the orator is carried away by his desire to show off his powers, or by uncontrollable emotion, even then he should not quicken his pace and heap up words to an extent greater than the ear can endure. ”
