No war ought ever to be undertaken but under circumstances...

No war ought ever to be undertaken but under circumstances which render all intercourse of courtesy between the combatants impossible. It is a bad thing that men should hate each other; but it is far worse that they should contract the habit of cutting one another's throats without hatred. War is never lenient but where it is wanton; when men are compelled to fight in self-defence, they must hate and avenge: this may be bad; but it is human nature.