Mark 9:23 does indeed say "all things are possible to him who believeth," but I'm pretty sure that doesn't mean we're intended to believeth in a savior with glowing hands or robot eyes who has an office in the East Wing of the White House.
Some songs written by two people don't come from the combined efforts of those two people. They come from elves, who write the songs while they wait for the Fudge Stripes to finish baking.