He understood that she was not only close to him, but that he could not now tell where he ended and she began. He realized it was from the agonizing feeling of division into two parts which he experienced at that moment. He felt hurt, but he immediately realized that he could not be offended with her because she was himself. For a moment he felt like a man who, upon receiving a blow from behind, turns around angrily with the desire to return the blow only to find that he had accidentally struck himself and that there was no one to be angry with and he had to endure and do his best to assuage the pain.
—  Of Lenin, Anna Kerenina by Leo Tolstoy