As long as a film stays unmade, the book is entirely yours, it belongs to the writer. As soon as you make it into a film, suddenly more people see it than have ever read the book.
The whole question of God and what God is, and whether it's a blond guy with a beard, I don't know... I don't know that. Do I believe that there's something greater at work than the sum of humanity? Yeah, I think so.