Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
What, say some, has the knowledge of the way to describe an equilateral triangle on a given straight line got to do with pleading in the law-courts or speaking in the senate? Will an acquaintance with the names and intervals of the notes of the lyre help an orator to defend a criminal or direct the policy of his country?
They will perhaps produce a long list of orators who are most effective in the courts but have never sat under a geometrician and whose understanding of music is confined to the pleasure which their ears, like those of other men, derive from it. To such critics I reply, and Cicero frequently makes the same remark in his Orator, that I am not describing any orator who actually exists or has existed, but have in my mind's eye an ideal orator, perfect down to the smallest detail.
For when the philosophers describe the ideal sage who is to be consummate in all knowledge and a very god incarnate, as they say, they would have him receive instruction not merely in the knowledge of things human and divine, but would also lead him through a course of subjects, which in themselves are comparatively trivial, as for instance the elaborate subtleties of formal logic: not that acquaintance
horn[*]( You have what you have not lost: you have not lost horns: therefore you have horns. ) or
crocodile[*]( A crocodile, having seized a woman's son, said that he would restore him, if she would tell him the truth. She replied, You will not restore him. Was it the crocodile's duty to give him up? ) problems can make a man wise, but because it is important that he should never trip even in the smallest trifles.
So too the teacher of geometry, music or other subjects which I would class with these, will not be able to create the perfect orator (who like the philosopher ought to be a wise man), but none the less these arts will assist in his perfection. I may draw a parallel from the use of antidotes and other remedies applied to the eyes or to wounds. We know that these are composed of ingredients which produce many and sometimes contrary effects, but mixed together they make a single compound resembling no one of its component parts, but deriving its peculiar properties from all:
so too dumb insects produce honey, whose taste is beyond the skill of man to imitate, from different kinds of flowers and juices. Shall we marvel then, if oratory, the highest gift of providence to man, needs the assistance of many arts, which, although they do not reveal or intrude themselves in actual speaking, supply hidden forces and make their silent presence felt?