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,
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.
But we must use the same critical caution in studying the philosophers that we require in reading history or poetry; that is to say, we must bear in mind that, even when we are dealing with the same subjects, there is a wide difference between forensic disputes and philosophical discussions, between the law-courts and the lecture-room, between the precepts of theory and the perils of the bar.