What I want to show in this chapter is that, given the force of the immaturity view and the imperative represented by the new agnosticism, it isn’t reasonable to believe metaphysical naturalism to be true – at least when it is formulated in such a way as to oppose religious ideas. I’m not saying we should regard the claim as false. For all we know, it may turn out to be true. But in circumstances of religious immaturity it is not the fierce threat and danger to religious ideas of transcendence that, in our culture, it is commonly thought to be.