2.2.1 To what, you ask, is this inquiry relevant? It is so that we can know what anger is. For if it comes to birth against our will [invitis], it will never succumb to reason. For all movements which are not brought about by our will [voluntas] are beyond control and inevitable, like shivering when sprinkled with cold water and the recoil from certain contacts. At bad news our hair stands on end, at improper words a blush suffuses us, and vertigo follows when we look at a steep drop.

2.2.2 Anger is put to flight by precepts [praecepta]. For it is a voluntary vice of the mind, not something that comes out of some circumstance of the human lot, so befalls even the wisest. Under that heading we must put that first shock [ictus] of the mind which moves us after we believe there is an injustice.

2.2.3 This creeps in even amid the theatrical sights of the stage or the recital of ancient deeds. Often we seem [videmur] to be angry with Clodius for exiling Cicero and with Antony for killing him. Who is not roused [concitari] against the weapons of Marius, or the proscription of Sulla? Who is not disturbed [infestus] at Theodotus and Achillas and that child who dared the unchildlike crime?