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 now come to the subject of ornament, in which, more than in any other department, the orator undoubtedly allows himself the greatest indulgence. For a speaker wins but trifling praise if he does no more than speak with correctness and lucidity; in fact his speech seems rather to be free from blemish than to have any positive merit.
Even the untrained often possess the gift of invention, and no great learning need be assumed for the satisfactory arrangement of our matter, while if any more recondite art is required, it is generally concealed, since unconcealed it would cease to be an art, while all these qualities are employed solely to serve the interests of the actual case. On the other hand, by the employment of skilful ornament the orator
If in his defence of Cornelius Cicero had confined himself merely to instructing the judge and speaking in clear and idiomatic Latin without a thought beyond the interests of his case, would he ever have compelled the Roman people to proclaim their admiration not merely by acclamation, but by thunders of applause? No, it was the sublimity and splendour, the brilliance and the weight of his eloquence that evoked such clamorous enthusiasm.