Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Such action was taken by Hortensius, the Luculli, Sulpicius, Cicero, Caesar and many others, among them both the Catos, of whom one was actually called the Wise, [*](i.e. Cato the Elder. ) while if the other is not regarded as wise, I do not know of any that can claim the title after him. On the other hand, this same orator of ours will not defend all and sundry: that haven of safety which his eloquence provides will never be opened to pirates as it is to others, and he will be led to undertake cases mainly by consideration of their nature.