What an unbearable creature he must have been in those days--and yet in those days he had been comparatively innocent. That was another mystery: it sometimes seemed to him that venial sins--impatience, an unimportant lie, pride, a neglected opportunity--cut you off from grace more completely than the worst sins of all. Then, in his innocence, he had felt no love for anyone; now in his corruption he had learnt.
You have to put your ego aside as an actor. Or you're using your ego to tell the story. Your body is a part of a tool to tell the story. So if you feel something, it's wrong. It means you're not inside of the character.