Marcel Theroux said this quote

...the years have taught me not to wonder too much at the dark things men do. Strange how it is that men never act crueller than when they're fighting for the sake of an idea. We've been killing since Cain over who stands closer to god. It seems to me that cruelty is just in the way of things. You drive yourself mad if you take it all personal. Those who hurt you don't have the power over you they would like. That's why they do what they do. And I'm not going to give them the power now. But it was a cruel thing that they did, and when they had finished hurting me, a splinter of loneliness seemed to break off and stay inside me forever.