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 a result you will find that certain persons who show astonishing skill in philosophical debate, as soon as they quit the sphere of their quibbles, are as helpless in any case that demands more serious pleading as those small animals which, though nimble enough in a confined space, are easily captured in an open field.
Proceeding to moral philosophy or ethics, we may note that it at any rate is entirely suited to the orator. For vast as is the variety of cases (since in
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them, as I have pointed out in previous books, we seek to discover certain points by conjecture, [*]( See vi. 45. ) reach our conclusions in others by means of definition, [*](See III. vi. 45.) dispose of others on legal grounds' or by raising the question of competence, [*](See ill. vi. 23.) while other points are established by syllogism [*](See III. vi. 15.) and others involve contradictions [*]( Probably an allusion to contradictory laws. See VIII. vii. ) or are diversely interpreted owing to some ambiguity of language [*](See VII. ix.) ), there is scarcely a single one which does not at some point or another involve the discussion of equity and virtue, while there are also, as everyone knows, not a few which turn entirely on questions of quality.