Institutio Oratoria

Quintilian

Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.

These persons have as a rule held that the task of oratory lies in persuasion or speaking in a persuasive manner: for this is within the power of a bad man no less than a good. Hence we get the common definition of rhetoric as the power of persuading. What I call a power, many call a capacity, and some a faculty. In order therefore that there may be no misunderstanding I will say that by power I mean δύναμις.

This view is derived from Isocrates, if indeed the treatise on

v1-3 p.303

rhetoric [*]( This treatise is lost. It may have been the work of the younger Isocrates. ) which circulates under his name is really from his hand. He, although far from agreeing with those whose aim is to disparage the duties of an orator, somewhat rashly defined rhetoric as πειθοῦς δημιουργός, the

worker of persuasion

: for I cannot bring myself to use the peculiar derivative which Ennius [*](Ann. ix. 309 (Vahlen). The derivative to which he objects is the rare word suada. ) applies to Marcus Cethegus in the phrase suadae medulla, the

marrow of persuasion.