What if one were to want to hunt for these hidden presences? You can't just rummage around like you're at a yard sale. You have to listen. You have to pay attention. There are certain things you can't look at directly. You need to trick them into revealing themselves. That's what we're doing with Walter, Jaz. We're juxtaposing things, listening for echoes. It's not some silly cybernetic dream of command and control, modeling the whole world so you can predict the outcome. It's certainly not a theory of everything. I don't have a theory of any kind. What I have is far more profound.' 'What's that?' 'A sense of humor.' Jaz looked at him, trying to find a clue in his gaunt face, in the clear gray eyes watching him with such - what? Amusement? Condescension? There was something about the man which brought on a sort of hermeneutic despair. He was a forest of signs. 'We're hunting for jokes.' Bachman spoke slowly, as if to a child. 'Parapraxes. Cosmic slips of the tongue. They're the key to the locked door. They'll help us discover it.' 'Discover what?' 'The face of God. What else would we be looking for?