O'Brien is smiling. "The real power," he says, is not power over things, but over men." He pauses and for a moment looks like a teacher talking to a clever schoolboy. "How does one man show that he has power over another man, Winston?"
Winston thinks. "Buy making him suffer," he says.
"Exactly. By making him suffer. Power means causing pain. Power lies in taking human minds to pieces and putting them together again in new shapes of your own choice.