Institutio Oratoria

Further, I would not even tolerate the affectation of those who insist that their friends, and not themselves, should be instructed in the facts of the case, though this is a less serious evil, if the friends can be relied upon to learn and supply the facts correctly. But who can give such effective study to the case as the advocate himself? How can the intermediary, the go-between or interpreter, devote himself whole-heartedly to the study of other men's cases, when those who have got to do the actual pleading do not think it worth while to get up their own?