Ultimately, all things are known because you want to believe you know. - Frank Herbert

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. Why can't you hear Muad'Dib? If certainty is knowing absolutely an absolute future, then that's only death disguised! Such a future becomes now!

Thou shalt not make a machine in the likeness of a human mind.

A man is a fool not to put everything he has, at any given moment, into what he is creating.