 If this is a meaningless universe, if we didn't come from anywhere and we're not going anywhere and we just happen to be here on this rock floating through space and there is no God, then there is nothing above nature. There is no supernatural realm. So if the gods don't exist and human souls don't go anywhere in the afterlife because there is no afterlife and there are no angels and there are no devils and there's no punishment, there's no reward.