Book 3.16

As long, however, as we find nothing in our life so unbearable as to drive us to suicide, let us, in whatever position we may be, set anger far from us: it is destructive to those who are its slaves. All its rage turns to its own misery, and authority becomes all the more irksome the more obstinately it is resisted. It is like a wild animal whose struggles only pull the noose by which it is caught tighter; or like birds who, while flurriedly trying to shake themselves free, smear birdlime onto all their feathers. No yoke is so grievous as not to hurt him who struggles against it more than him who yields to it: the only way to alleviate great evils is to endure them and to submit to do what they compel. This control of our passions, and especially of this mad and unbridled passion of anger, is useful to subjects, but still more useful to kings. All is lost when a man's position enables him to carry out whatever anger prompts him to do; nor can power long endure if it be exercised to the injury of many, for it becomes endangered as soon as common fear draws together those who bewail themselves separately. Many kings, therefore, have fallen victims, some to single individuals, others to entire peoples, who have been forced by general indignation to make one man the minister of their wrath. Yet many kings have indulged their anger as though it were a privilege of royalty, like Darius, who, after the dethronement of the Magian, was the first ruler of the Persians and of the greater part of the East: for when he declared war against the Scythians who bordered on the empire of the East, Oeobazus, an aged noble, begged that one of his three sons might be left at home to comfort his father, and that the king might be satisfied with the services of two of them. Darius promised him more than he asked for, saying that he would allow all three to remain at home, and flung their dead bodies before their father's eyes. He would have been harsh, had he taken them all to the war with him. How much more good-natured was Xerxes, who, when Pythias, the father of five sons, begged for one to be excused from service, permitted him to choose which he wished for. He then tore the son whom the father had chosen into two halves, placed one on each side of the road, and, as it were, purified his army by means of this propitiatory victim. He therefore had the end which he deserved, being defeated, and his army scattered far and wide in utter rout, while he in the midst of it walked among the corpses of his soldiers, seeing on all sides the signs of his own overthrow.