Institutio Oratoria

It is not uncommon for the litigant to demand a base and inhuman gratification of his rancour, such as not a single man among the audience will approve, for it is on revenge rather than on protection that his heart is set. But in this, as in a number of other points, it is the duty of the orator to refuse to comply with his clients' desires. For how can a man with the least degree of gentlemanly feeling consent to make a brutal attack merely because another desires it?