In response to a friend whose friend is interested in the occult, I recently wrote:
There is a little bit on neo-paganism in chapter 5 of my book The Beauty of God for a Broken World. Regarding the occult more generally:
(1) The English word comes from a Latin root meaning "to cover up, hide, conceal." People are attracted to the occult because it promises to give hidden knowledge and to open up mysteries not available to the common run of humanity. Its appeal is similar to the appeal that conspiracy theories have for a certain kind of person.
(2) The Bible also speaks of mysteries, but they are a different kind of thing. The Bible's mysteries are things not previously known or discoverable by human reason, but now revealed for all to see.
(3) I compare them thus. The occult arts profess to reveal dark mysteries to the initiated. The Bible reveals bright mysteries in a public fashion. The difference between a bright mystery and a dark mystery is this. A dark mystery is like a cave. An apparently friendly enemy lures you into the cave with the promise of finding hidden treasure, but once you are inside and can't see anything, he pushes you down into a hundred-foot-deep hole. A bright mystery is like the sun. You can't look at it for very long, but by its light you can see and make sense of the world around you. Such are the mysteries of the Trinity, the incarnation and the atoning death of Christ.