Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
There is, it is true,
v10-12 p.23
another advantage which we may derive from the historians, which, however, despite its great importance, has no bearing on our present topic; I refer to the advantage derived from the knowledge of historical facts and precedents, with which it is most desirable that our orator should be acquainted; for such knowledge will save him from having to acquire all his evidence from his client and will enable him to draw much that is germane to his case from the careful study of antiquity. And such arguments will be all the more effective, since they alone will be above suspicion of prejudice or partiality. The fact that there is so much for which we must have recourse to the study of the philosophers is the fault of orators who have abandoned [*](cp. I Pref. 11. ) to them the fullest portion of their own task. The Stoics more especially discourse and argue with great keenness on what is just, honourable, expedient and the reverse, as well as on the problems of theology, while the Socratics give the future orator a first-rate preparation for forensic debates and the examination of witnesses.