One of the exhilarating things about Christian metaphysics is how it opens up vistas of possibility that atheism can only dream of. Literally, that atheism can only dream of.
For instance, how many readers of Perelandra have yearned to actually visit Perelandra and experience firsthand the exotic world of sensory enhanced sights, sounds, taste, touch, and fragrance. Lewis's intense, visionary descriptions whet the appetite to go there. His novel is a tantalizing appetizer of an imaginary world that's too good to be true. Or is it?
But if the Christian God exists, then there are senses in which it would be possible to visit Perelandra. Lewis's Perelandra existed in God's mind before it ever existed in Lewis's mind. Human imagination is parasitic on God's imagination. There's nothing we think that God hasn't thought before. Indeed, Lewis's Perelandra is a pale imitation of God's minutely detailed idea.
Given God's omniscience and omnipotence, it's possible for God to create Perelandra in a parallel universe. God can fill in all the practical necessities to make it feasible and hospitable.
Or God could cause us to experience an immersive simulation of Perelandra. Our experience of virtual Perelandra would be phenomenologically indistinguishable from a physical visit to a physical planet.
I'm by no means suggesting that Perelandra is real. I'm just pointing out that God could make that a reality. Christian metaphysics makes so many things possible that are utterly impossible in a godless universe where only matter and energy exist. A bracing consideration.