If you cannot or will not imagine the results of your actions, there's no way you can act morally or responsibly. Little kids can't do it; babies are… - Ursula K. Le Guin

He explained to Atro that he now understood why the army was organized as it was. It was indeed quite necessary. No rational form of organization would serve the purpose. He simply had not understood that the purpose was to enable men with machine guns to kill unarmed men and women easily and in great quantities when told to do so. Only he still could not see where courage, or manliness, or fitness entered in.

There is a bird in a poem by T. S. Eliot who says that mankind cannot bear very much reality; but the bird is mistaken. A man can endure the entire weight of the universe for eighty years. It is unreality that he cannot bear.

He said after a little while, 'I see why you say that only men do evil, I think. Even sharks are innocent, they kill because they must.'
'That is why nothing can resist us. Only one thing in the worl can resist an evil-hearted man. And that is another man. In our shame is our glory. Only our spirit, which is capable of evil, is capable of overcoming it.