Institutio Oratoria

Quintilian

Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.

But all these arguments take place within their own circle, for, as though they were tied by some solemn oath or held fast in the bonds of some superstitious belief, they consider that it is a crime to abandon a conviction once formed. On the other hand, there is no need for an orator to swear allegiance to any one philosophic code.