Why believe in the supernatural?

Why do people believe in things that go against natural laws? It cannot simply be ignorance.

The answer is evidence. The number-one reason given by people who believe in the supernatural is personal experience.

Bruce M. Hood, The Science of Superstition: How the Developing Brain Creates Supernatural Beliefs (New York: HarperCollins, 2009), p. 3 (former title: SuperSense: Why We Believe in the Unbelievable)