I am a Christian. I believe the Bible, all the way through.
Therefore, of necessity, I believe in magic. I believe in the bad kind — which I steer well clear of, of course — the witch at En Dor calling up the dead, the prophets of Ba’al cutting themselves to get their god’s attention, sacrificing a living baby to sexual freedom Molech, and so on. Vile stuff.
But I also believe in the good kind: multiplying bread and fish, walking on water, parting the seas, calling down fire or food from the clear blue sky.
And not all of it is “nice.” Moses’ serpent devours the serpents made by the Egyptian sorcerers. Elijah stops the rain, and won’t bring it back for three whole years. Walk around the walls and shout, and Jericho’s defenses crumble. Moses holds his staff over the battlefield, and Israel prevails. Joshua orders the sun and moon to stand still so Israel can crush her enemies.
Why does this sort of thing work?
A better question might be: why not? The whole world is spoken into existence to start with. It didn’t evolve in place by inexorable natural process; the world is magic from the word go. (Actually, the word was “Light!”) The things which are seen are not made of the things which are visible.
Which is to say that the materialist conception of the physical world is wrong, all the way down. It’s not true “as far as it goes,” but missing an additional layer of spiritual truth. Richard Dawkins is wrong about Newtonian physics, he’s wrong about quantum physics, he’s wrong about the nature of the rock under his feet and the sun over his head and the air in his lungs. He says those things are just there, matter in motion. We know those things are words. They were spoken into existence by God and continue to be upheld by the Word of His power, and that is a difference that goes all the way down.
For what it’s worth, here’s some other good discussions on the subject: