Book 2 · Section 55

(55) And some persons say that as on occasion of the slaying of tyrants, it is lawful that their relations also should be put to death, in order that transgressions may be checked by the terrible magnitude of the punishment inflicted: in like manner in pestilential diseases, it is necessary that some of those who are not guilty should be involved in the destruction, in order that others who are at a distance may learn moderation. Besides that, it is inevitable that those who are exposed to a pestilential atmosphere must become diseased just as all persons who are exposed to a storm on board a ship must be all exposed to equal danger. (56) But those wild beasts which are courageous have been created; for we must not suppress the truth (as if one were to anticipate the defence likely to be made by a man of powerful eloquence and tare it to pieces beforehand), in order that men may, by practising against them, acquire hardihood for the contests of war; for gymnastic exercises and continued hunting train men and inure their souls in a greater degree even than their bodies to rely upon their own courage, and energy, and strength, so as to disregard the sudden attacks of their enemies.