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 the present I must add that I do not even agree with those who hold that arguments should always be expressed in language which is not only pure, lucid and distinct, but also as free as possible from all elevation and ornateness. I readily admit that
v4-6 p.369
arguments should be distinct and clear, and further that in arguments of a minor character the language and words should be as appropriate and as familiar as possible.