Teaching at best beckons us to morality, but it is not in itself efficacious. Teaching is like a mirror. It can show you if your face is dirty, but it the mirror will not wash your face.
One can't found a novel theology on Nothing, and nothing is so secure a foundation as a contradiction. Look at the great successes of the past--they say their deities are the masters of all the universes, and yet that they require grandmothers to defend them, as if they were children frightened by poultry. Or that the authority that punishes no one while there exists a chance for reformation will punish everyone when there is no possibility anyone will become the better for it.