Why would the one true creator of the universe only reveal himself to Bronze-age societies in the Middle East several thousand years ago… and then never be heard from again?
"My mind is incapable of conceiving such a thing as a soul. I may be in error, and man may have a soul; but I simply do not believe it. What a soul may be is beyond my understanding." -- Thomas Edison [http://en.wikiquote.org/wiki/Thomas_Edison]