> "The funny thing is, when you really know somebody, you don't really know them at all. You think you do, but you don't. You think you're letting them know everything, but you're not. You can't. And after you've told them everything, you feel as if you've lost them. It's a funny thing. It's really a very funny thing."
While it is technically a quote from the novel, it's not an exact quote of something Holden directly says to another character.