Catena Aurea on Luke 3:10–14: Augustine of Hippo

For he knew that soldiers, when they use their arms, are not homicides, but the ministers of the law; not the avengers of their own injuries, but the defenders of the public safety. Otherwise he might have answered, “Put away your arms, abandon warfare, strike no one, wound no one, destroy no one.” For what is it that is blamed in war? Is it that men die, who some time or other must die, that the conquerors might rule in peace? To blame this is the part of timid not religious men. The desire of injury, the cruelty of revenge, a savage and pitiless disposition, the fierceness of rebellion, the lust of power, and such like things are the evils which are justly blamed in wars, which generally for the sake of thereby bringing punishment upon the violence of those who resist, are undertaken and carried on by good men either by command of God or some lawful authority, when they find themselves in that order of things in which their very condition justly obliges them either to command such a thing themselves, or to obey when others command it.