As a source of objective morality, the Bible is one of the worst books we have. It might be the very worst, in fact—if we didn’t also happen to have the Qur’an.

It is important to point out that we decide what is good in the Good Book. We read the Golden Rule and judge it to be a brilliant distillation of many of our ethical impulses; we read that a woman found not to be a virgin on her wedding night should be stoned to death, and we (if we are civilized) decide that this is the most vile lunacy imaginable. Our own ethical intuitions are, therefore, primary. So the choice before us is simple: we can either have a twenty-first-century conversation about ethics—availing ourselves of all the arguments and scientific insights that have accumulated in the last two thousand years of human discourse—or we can confine ourselves to a first-century conversation as it is preserved in the Bible.