“Let the orator whom I propose to form, then, be such a one as is characterized by the definition of Marcus Cato, a good man skilled in speaking. But the requisite which Cato has placed first in this definition—that an orator should be a good man—is naturally of more estimation and importance than the other.”
Sit ergo nobis orator quem constituimus is qui a M. Catone finitur vir bonus dicendi peritus, verum, id quod et ille posuit prius et ipsa natura potius ac maius est, utique vir bonus.
Quintilian (35–96) ancient Roman rhetor
Book XII, Chapter I, 1; translation by Rev. John Selby Watson
De Institutione Oratoria (c. 95 AD)