Booth: You know what it feels like to get your faith back?
Bones: When I see effects and I'm unable to discern the cause, my faith in reason and consequences is shaken.
Booth: Then what happens?
Bones: Two plus two equals four. I put sugar in my coffee and it tastes sweet. The sun comes up because the world turns. These things are beautiful to me. There are mysteries I will never understand, but everywhere I look, I see proof that for every effect there is a corresponding cause, even if I can't see it. I find that reassuring.
Booth: And life is good again.
Bones: Life is very good.
Booth: Yes, it is.