Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
The orator then, whom I am concerned to form, shall be the orator as defined by Marcus Cato,
a good man, skilled in speaking.[*](cp. I. Pr. 9. ) But above all he must possess the quality which Cato places first and which is in the very nature of things the greatest and most important, that is, he must be a good man. This is essential not merely on account of the fact that, if the powers of eloquence serve only to lend arms to crime, there can be nothing more pernicious than
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eloquence to public and private welfare alike, while I myself, who have laboured to the best of my ability to contribute something of value to oratory, shall have rendered the worst of services to mankind, if I forge these weapons not for a soldier, but for a robber. But why speak of myself? Nature herself will have proved not a mother, but a stepmother with regard to what we deem her greatest gift to man, the gift that distinguishes us from other living things, if she devised the power of speech to be the accomplice of crime, the foe to innocency and the enemy of truth. For it had been better for men to be born dumb and devoid of reason than to turn the gifts of providence to their mutual destruction.