Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Still we must none the less follow the ideal, as was done by not a few of the ancients, who, though they refused to admit that the perfect sage had yet been found, none the less handed down precepts of wisdom for the use of posterity.