"Do you remember writing in your diary," he said, "that it did not matter whether I was a friend or an enemy, since I was at least a person who understood you and could be talked to? You were right. I enjoy talking to you. Your mind appeals to me. It resembles my own mind except that you happen to be insane."
1984 (Nineteen Eighty-Four)
O'Brien to Winston, Part 3, Chapter 2.