Institutio Oratoria

This fact makes the refusal to take an oath all the more difficult, unless indeed the affair in question be of such a nature that it cannot be supposed that the facts are known to the person asked to take the oath. Failing this excuse, there

is only one course open to him: he must say that his opponent is trying to excite a prejudice against him and is endeavouring to give the impression that he has real ground for complaint though he is not in a position to win his case; consequently, though a dishonest man would eagerly have availed himself of the proposal, he prefers to prove the truth of his statements rather than leave a doubt in anyone's mind as to whether he has committed perjury or no.