Today "demonstration of mediumship" is part of the church service at all churches affiliated with the National Spiritualist Association of Churches (NSAC) and the Spiritualists' National Union (SNU). Demonstration links to NSAC's Declaration of Principal #9. "We affirm that the precepts of Prophecy and Healing are Divine attributes proven through Mediumship."
The word clairvoyance means “to see clearly.” This does not refer to the sense of sight, but rather to seeing with what some call the “inner eye” or “third eye.” Others may refer to this ability as a “sixth sense.” What’s common to all of these terms and definitions is that they refer to an ability to perceive hidden truths. Clairvoyant psychics have the ability to tap into energies that the average person is not able to perceive. For this reason, many people turn to clairvoyants for guidance in various areas of their lives.