"Unfortunately what is little recognized is that the most worthwhile scientific books are those in which the author clearly indicates what he does not know; for an author most hurts his readers by concealing difficulties."
(Galois, Évariste)
"I've learned something that a lot of people could usefully know: how to be extremely persistent and whenever one avenue was blocked find another."
(R. Stallman http://kerneltrap.org/node/4484)
":q :q! :wq :w :w! :wq! :quit :quit! :help help helpquit quit quithelp
:quitplease :quitnow :leave :shit ^X^C ^C ^D ^Z ^Q QUITDAMMIT ^[:wq"
(fortune)