Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Finally we may derive confidence from the practice of the greatest orators of drawing upon the early poets to support their arguments or adorn their eloquence.
For we find, more especially in the pages of Cicero, but frequently in Asinius and other orators of that period, quotations from Ennius, Accius, Pacuvius, Lucilius, Terence, Caecilius and others, inserted not merely to show the speaker's learning, but to please his hearers as well, since the charms of poetry provide a pleasant relief from the severity of forensic eloquence.
Such quotations have the additional advantage of helping the speaker's case, for the orator makes use of the sentiments expressed by the poet as evidence in support of his own statements. But while my earlier remarks have special application to the education of boys, those which I have just made