If a humanist or an atheist or an agnostic says, "We'll bake you a pie," we can go right into the kitchen and bake it, and you can eat it an hour later. We don't promise you a pie in the sky by and by. It's charlatanry to promise people something that no one can be sure will ever be delivered. But it's even worse to offer people a reward, like children, for being good, and to threaten them with punishment if they're not.