"I am that I am," is the Old Testament quoting God directly. "God is love," says the New Testament. "God is a verb," counters Buckminster Fuller. "God is dead," claimed Nietzsche. And then there's Picasso: "God is really only another artist. He invented the giraffe, the elephant, and the cat. He has no real style. He just goes on trying other things." What are we to make of this? Compiled and edited by the author of the bestselling "The Little Zen...