Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
For I do not wish the student to wear
Why did Plato bear away the palm in all these branches of knowledge which in my opinion the future orator should learn? I answer, because he was not merely content with the teaching which Athens was able to provide or even with that of the Pythagoreans whom he visited in Italy, but even approached the priests of Egypt and made himself thoroughly acquainted with all their secret lore.
The plea of the difficulty of the subject is put forward merely to cloak our indolence, because we do not love the work that lies before us nor seek to win eloquence for our own because it is a noble art and the fairest thing in all the world, but gird up our loins for mercenary ends and for the winning of filthy lucre.