Cicero

Publius Consta, too, who wanted to be a lawyer, but was ignorant and stupid, was once summoned by Cicero as witness in a case; and when he kept saying that he knew nothing, Perhaps, said Cicero, you think you are being questioned on points of law. Again, in a dispute with Cicero, Metellus Nepos asked repeatedly Who is your father? In your case, said Cicero, your mother has made the answer to this question rather difficult.

Now, the mother of Nepos was thought to be unchaste, and he himself a fickle sort of man. He once suddenly deserted his office of tribune and sailed off to join Pompey in Syria, and then came back from there with even less reason. Moreover, after burying his teacher Philagrus with more than usual ceremony, he set upon his tomb a raven in stone; whereupon Cicero remarked: In this you have acted more wisely than is your wont, for he taught you to fly rather than to speak.

And again, when Marcus Appius prefaced his speech in a case by saying that his friend had begged him to exhibit diligence, eloquence, and fidelity, And then, said Cicero, are you so hard-hearted as to exhibit none of those great qualities which your friend demanded?