By Catherine Beyer. Theistic Satanism encompasses a variety of related beliefs honoring a figure addresses as Satan or associated with Satan. In contrast to LaVeyan Satanism, which is atheistic and considers Satan merely a symbol for what their faith encourages, theistic Satanists view Satan as an actual being.Theistic Satanism is largely a development of the 20th century.n contrast to LaVeyan Satanism, which is atheistic and considers Satan merely a symbol for what their faith encourages, theistic Satanists view Satan as an actual being.