Men should be either treated generously or destroyed, because they take revenge for slight injuries – for heavy ones they cannot. – Niccolo Machiavelli

Men ought either to be indulged or utterly destroyed, for if you merely offend them they take vengeance, but if you injure them greatly they are unable to retaliate, so that the injury done to a man ought to be such that vengeance cannot be feared. – Niccolo Machiavelli