Book 11
1.22
But the most ostentatious kind of boasting takes the form of actual self-derision. Let us therefore leave it to others to praise us. For it beseems us, as Demosthenes says, to blush even when we are praised by others. I do not mean to deny that there are occasions when an orator may speak of his own achievements, as Demosthenes himself does in his defence of Ctesiphon. De Cor. 128. But on that occasion he qualified his statements in such a way as to show that he was compelled by necessity to do so, and to throw the odium attaching to such a proceeding on the man who had forced him to it.
1.23
Again, Cicero often speaks of his suppression of the Catilinarian conspiracy, but either attributes his success to the courage shown by the senate or to the providence of the immortal gods. If he puts forward stronger claims to merit, it is generally when speaking against his enemies and detractors; for he was bound to defend his actions when they were denounced as discreditable.