Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
For my own part I think that those who have argued against this view did not realise what they were saying, but merely desired to exercise their wits by the selection of a difficult theme, like Polycrates, when he praised Busiris and Clytemnestra; I may add that he is credited with a not dissimilar performance, namely the composition of a speech which was delivered against Socrates.
Some would have it that rhetoric is a natural gift though they admit that it can be developed by practice. So Antonius in the de Oralore [*](II. lvii. 232.) of Cicero styles it a knack derived from experience, but denies that it is an art:
this statement is however not intended to be accepted by us as the actual truth, but is inserted to make