No passion is more eager for revenge than anger, and for that very reason it is unapt to obtain it: being over hasty and frantic, like almost all desires, it hinders itself in the attainment of its own object, and therefore has never been useful either in peace or war: for it makes peace like war, and when in arms forgets that Mars belongs to neither side, and falls into the power of the enemy, because it is not in its own.