THEISTIC SATANISM (also known as traditional Satanism or spiritual Satanism) is the belief that Satan—as prefigured in (most prevalent) Christian and/or Islamic (less often) contexts—is a supernatural being or force that individuals may contact and supplicate to, and represents loosely affiliated or independent groups and cabals which hold such a belief. Another characteristic of Theistic Satanism include the use of ceremonial magic. Unlike LaVeyan Satanism, as founded by Anton LaVey in the 1960s, theistic Satanism is theistic as opposed to atheistic, believing that Satan is a real entity rather than an archetype.
LAVEYAN SATANISM (also known as ATHEISTIC SATANISM or Modern Satanism), referred to simply as Satanism among adherents, is a religious philosophy founded in 1966 by Anton LaVey and codified in The Satanic Bible in 1969. Its core beliefs and philosophies are based on individualism, epicureanism, secularism, egoism, and self-deification, and propagates a worldview of naturalism, Social Darwinism, and Lex Talionis.
Contrary to popular belief, LaVeyan Satanism does not involve “devil worship” or worship of any deities. It is an atheistic philosophy that uses the character of Satan as a symbol of pride, carnality, liberty, enlightenment, undefiled wisdom, and of a cosmos which Satanists perceive to be permeated and motivated by a force that has been given many names by humans over the course of time.