"Abandon certainty! That's life's deepest command. That's what life's all about. We're a probe into the unknown, into the uncertain. If certainty is knowing absolutely an absolute future, then that's only death disguised! Such a future becomes now! Completion equals death! To exist is to stand out, away from the background. You aren't thinking or really existing unless you're willing to risk even your own sanity in the judgment of your existence." — Paul Atreides, Children of Dune