 The third book of The Satanic Bible describes rituals and magic . According to Joshua Gunn , these are adapted from books of ritual magic such as Crowley 's Magick : Elementary Theory . The Satanic Rituals , published by LaVey in 1972 , outlines the rituals more precisely , and contains the entire text of the Black Mass . LaVey begins The Book of Belial by defining magic as " The change in situations or events in accordance with one 's will , which would , using normally accepted methods , be unchangeable . " He explains that some of the rituals are simply applied psychology or science , but that some contain parts with no scientific basis . 
