If you’re interested, Tim Challies has an excellent review of Stephen Hawking’s new work right here. I highly recommend it–too many people think Hawking’s Grand Design is a stunning rebuke to Christian beliefs, when in reality it’s little more than freshly packaged scientism. I particularly enjoyed the following summary:
Finally, p.180 does offer an explanation of spontaneous creation. The conservation of energy means that universes can only be created from nothing if their net energy is zero, with negative gravitational energy balancing out the positive energy of matter and radiation. This necessitates that a law of gravity must exist. Because a law of gravity exists it must and will of itself create universes out of nothing (no reasoning given).
So gravity is God.