The supernatural has always intrigued people. Intellectuals and atheists may scorn interest in spiritual or supernatural things, but the majority of people in the world are fascinated by it.

Consider what's popular in entertainment and gaming. Superheros, spirits, wizards, and various creatures from the netherworld are featured in some of the most popular TV series, movies, games, and books.

Humans are created with a spiritual capacity and longing. It's built into us. As King Solomon said, "He [God] has put eternity into man's heart" (Eccl 3:11). And yet, we live in a physical world and perceive it through our five physical senses.