Indeed rhetoricians are permitted to lie about historical matters so they can speak more subtly. - Cicero

What! You would convict me from my own words, and bring against me what I had said or written elsewhere. You may act in that manner with those who dispute by established rules. We live from hand to mouth, and say anything that strikes our mind with probability, so that we are the only people who are really at liberty."

Finally, an orator must have a keen mind capable of remembering a vast array of relevant precedents and examples from history, along with a thorough knowledge of the law and civil statutes.

Uma casa sem livros é como um corpo sem alma