This remark will be found to hold true, from the days of Lysias and Isocrates, of Plato and Aristotle, down to those of Plutarch and Epictetus, Suetonius, and Quintilian.
Quintilian, a brilliant Spanish rhetorician whose abilities in ancient times were deemed to be second only to those of Cicero, established a school of rhetoric in Rome in the late 60s AD which flourished during Vespasian's rule.
Marcus Fabius Quintilianus (c. 35 – c. 100 CE) was a Roman rhetorician from Hispania, widely referred to in medieval schools of rhetoric and in Renaissance writing. In English translation, he is usually referred to as Quintilian (/kwɪnˈtɪljən, -iən/), although the alternate spellings of Quintillian and Quinctilian are occasionally seen, the latter in older texts.