Institutio Oratoria

Everyone who pleaded for the father indulged in figurative insinuations against the son, on the assumption that the father would, when tortured, be likely to name him as one of his accomplices. But what could be more foolish? For as

it is possible that this was his motive. May be. But he should then disguise his motive, in order that he may effect his purpose. But what will it profit us (and by us I mean the declaimers) to have realised this motive, unless we declare it as well? Well, then, if the case were being actually pleaded in the courts, should we have disclosed this secret motive in such a way? Again, if this is not the real motive, the condemned man may have other reasons for opposing his son; he may think that the law should be carried out or be unwilling to accept such a kindness from the hands of his accuser, or (and this is the line on which I personally should insist) he may intend to persist in declaring his innocence even under torture.