Forgive me for not really touching on the religious aspect of this question, that's a whole different can of worms, one I'm slightly less equipped to answer, but I'm sure it would cast knowledge and belief in a more "Sylvester and Tweety" kind of light. I'll simply write about belief in a more general way, which makes the couple's relationship more symbiotic, and more fun for the whole family.
Beliefs are meant to be analyzed and tested every once in a while. Your brain is like a car, things need to be opened up and checked and fixed, it'll run smoother and longer.
We've gotta have belief, though, too. I have to sincerely believe that tonight when I go out to walk my dog that I won't float away like a balloon. I have to believe that, writing this, I won't get sucked into my computer, lost in cyberspace for all time.
So, having said those two things, I'd prefer to compare Knowledge and Belief to something less oppositional than two points on a line. Let me get out my metaphor bag. Here we go.
You gotta build buildings out of steel so that people can move fluidly through them without constantly worrying if the shack is going to tip over and kill everyone.
Once you've built the building though, you've got to tear ass through that thing at full speed. Preferably on a scooter. Every day, you've gotta peek in and say "Fuck you" to the boss. You've gotta be at the water cooler fraternizing, you've got to be punching clocks off the wall and zipping around changing everyone's screen saver to an LOLcat, something. Get out a slip and slide and have a party or get to work and figure out how to build a better building. Something with a pool. Indoor pools are the shit.
You are this person, Ambiguity, constantly evolving, thanks to Knowledge, in this building, Belief.