Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
I should like, however, to consider the point more fully and explicitly by appealing to the actual work of oratory. For how will the orator succeed in panegyric unless he can distinguish between what is honourable and the reverse? How
If, on the other hand, each living thing has its own peculiar virtue, in which it excels the rest or, at any rate, the majority (I may instance the courage of the lion and the swiftness of the horse), it may be regarded as certain that the qualities in which man excels the rest are, above all, reason and powers of speech. Why, therefore, should we not consider that the special virtue of man lies just as much in eloquence as in reason? It will be with justice then that Cicero [*](de Or. III. xiv. 55. ) makes Crassus say that
eloquence is one of the highest virtues,and that Cicero himself calls it a virtue in his letters to Brutus [*](Lost.) and in other passages.