Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
As regards order, there is no part of a case which involves less trouble. For, if we are prosecuting, our first duty will be to prove our own case, our second to refute the arguments brought against it. If, on the other hand, we are defending, we must begin by refutation.