Institutio Oratoria

On the other hand there are some who surfer from excess of zeal, and think it their duty to reply to every word and even every trifling reflexion, a task which is at once endless and superfluous. For it is not the case. but the pleader, whom they are refuting. Personally I should always prefer that a speaker should reveal his eloquence in such a way that, if what he says advances his case, the credit will be given to his talent and not to the nature of his case, while if what he says damages his case the blame will attach to the case and not to his powers.