Look at all the happiest, sanest people you've known, Nelson. Really listen to them. I bet you'll find they don't fear a little inconsistency or uncertainty now and then. Oh, they try always to be true to their core beliefs, to achieve their goals and keep their promises. Still, they also avoid too much rigidity, forgiving the occasional contradiction and unexpected thought. They are content to be many.

Part XI (p. 630) - Earth (1990)