The Catcher in the Rye - Pg 202

  I went down by a different staircase, and I saw another "Fuck you" on the wall. I tried to rub it off with my hand again, but this one was scratched on, with a knife or something. It wouldn't come off. It's hopeless, anyway. If you had a million years to do it in, you couldn't rub out even half the "Fuck you" signs in the world. It's impossible.