Arthur says, “We can never kill Hitler.” “But you know it’s like that already. When you meet people. You meet them, say, when they’re thirty, and you can never really imagine them any younger than that. You’ve seen pictures of me, Arthur, you’ve seen me at twenty.” “You were a handsome guy.” “But really, really, you can’t imagine me any younger than my forties, can you?” “Sure, I can.” “You can picture it. But you can’t quite imagine it. You can’t go back any further. It’s against the laws of physics.”
