What's one final line in a book that left you disturbed for days?

Title, I suppose. What's one book that had a final line that disturbed you heavily? I realise this is very very hyper specific so I'll also vary to books that disturbed you in general. But with final lines specifically. I'll start:

"Someone should tell a blind man before setting him out that way."

-Outer Dark, Cormac Mccarthy. This line just filled me with such a profound sense of despair and hopelessness.