What is your favourite quote from a book?

This is the first one that came to mind. It crosses my mind surprisingly often and reminds me of an old friend.
"There must be quite a few things a hot bath won't cure, but I don't know many of them. Whenever I'm sad I'm going to die, or so nervous I can't sleep, or in love with somebody I won't be seeing for a week, I slump down just so far and then I say: "I'll go take a hot bath."
Sylvia Plath, The Bell Jar