Men do not rest content with parrying the attacks of a superior, but often strike the first blow to prevent the attack being made.
ThucydidesIf it had not been for the pernicious power of envy, men would not so have exalted vengeance above innocence and profit above justice... in these acts of revenge on others, men take it upon themselves to begin the process of repealing those general laws of humanity which are there to give a hope of salvation to all who are in distress.
Thucydides