Indeed it is recorded that this fate actually befell Marcus Porcius Latro, the first professor of rhetoric to make a name for himself; for when, at the height of his fame in the schools, he was called upon to plead a case in the forum, he put forward the most earnest request that the court should be transferred to some public hall. He was so unaccustomed to speak in the open air that all his eloquence seemed to reside within the compass of a roof and four walls.

For this reason a young man who has acquired a thorough knowledge from his instructors of the methods of invention and style (which is not by any means an endless task, if those instructors have the knowledge and the will to teach), and who has also managed to obtain a reasonable amount of practice in the art, should follow the custom in vogue with our ancestors, and select some one orator to follow and imitate. He should attend as many trials as possible and be a frequent spectator of the conflicts in which he is destined to take part.

Next he should write out speeches of his own dealing either with the cases which he has actually heard pleaded or with others, provided always they be actual cases, and should argue them from both sides, training himself with the real weapons of his warfare, just as gladiators do or as Brutus did in that speech in defence of Milo which I have already mentioned. See III. vi. 93; x. i. 23. This is better than writing replies to old speeches, as Cestius did to Cicero's defence of Milo in spite of the fact that, his knowledge being confined to what was said for the defence, he could not have possessed sufficient acquaintance with the other side of the case.