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 observations contained in the preceding five books approximately cover the method of invention and the arrangement of the material thus provided. It is absolutely necessary to acquire a thorough knowledge of this method in all its details, if we desire to become accomplished orators, but a simpler and briefer course of instruction is more suitable for beginners.
For they tend either to be deterred from study by the difficulties of so detailed and complicated a course, or lose heart at having to attempt tasks of such difficulty just at the very period when their minds need special nourishment and a more attractive form of diet, or think that when they have learned this much and no more, they are fully equipped for the tasks of eloquence, or finally, regarding themselves as fettered by certain fixed laws of oratory, shrink from making any effort on their own initiative.