Institutio Oratoria

It is but a step from this to practice in the comparison of the respective merits of two characters. This is of course a very similar theme to the preceding, but involves a duplication of the subject matter and deals not merely with the nature of virtues and vices, but with their degree as well. But the method to be followed in panegyric and invective will be dealt with in its proper place, as it forms the third department of rhetoric. [*](Book III. chap. vii.)

As to commonplaces (I refer to those in which we denounce vices themselves such as adultery, gambling or profligacy without attacking particular persons), they come straight from the courts and, if we add the name of the defendant, amount to actual accusations. As a rule, however, the general character of a commonplace is usually given a special turn: for instance we make our adulterer blind, our gambler poor and our profligate far advanced in years. Sometimes too they entail

for we may speak on behalf of luxury or love, while a pimp or a parasite may be defended in such a way that we appeal as counsel not for the character itself, but to rebut some specific charge that is brought against him.

Theses on the other hand are concerned with the comparison of things and involve questions such as

Which is preferable, town or country life?

Which deserves the greatest praise, the lawyer or the soldier?

Other theses too belong entirely to the deliberative class of oratory, as for instance the questions as to

Whether marriage is desirable

Whether a public career is a proper object of ambition.