It's a guideline. I don't care for religons; as they help people (generally!) act better, but when people fight over which religon is better, well its BS. Anyhoo, i think the only reason why Christianity (+ the bible) are still followed is because Chirtistanity, and God, are too vague to disprove. It was easy to disprove some older relgions, like (uh, Norsism) or w/e: as Thor - God of thunder - Made thunder by throwing down his hammer. Which isn't true, obviously.