Regardless of what else you may think of the Bible, the Bible is among other things a set of revealed constraints. It regulates how man is to represent what is right and wrong, good and evil, true or untrue. It enables us to conduct our lives in a more noble fashion. If God is acknowledged as real and the Bible as the word of God this would require a transformation of human conduct at the most basic level in the way we think, speak, and behave. If God is not real and if the Bible is not the world of God then there are no standards of right and wrong beyond what can be determined as such by the collective will of a society. Since all societies are so diverse, this would mean there is no concrete or absolute standard. Nothing essentially matters.