In either case he will look to the future, not to the past: for, as Plato says, “no wise man punishes anyone because he has sinned, but that he may sin no more: for what is past cannot be recalled, but what is to come may be checked.” Those, too, whom he wishes to make examples of the ill success of wickedness, he executes publicly, not merely in order that they themselves may die, but that by dying they may deter others from doing likewise. You see how free from any mental disturbance a man ought to be who has to weigh and consider all this, when he deals with a matter which ought to be handled with the utmost care, I mean, the power of life and death. The sword of justice is ill-placed in the hands of an angry man.