The source is a text titled "The Book of Ceremonial Magic" by Arthur Edward Waite. This text provides an extensive analysis of various historical grimoires and magical texts. Waite examines the origins, content, and practices described in these books, including rituals of black magic, white magic, and necromancy. He critically analyzes the claims made by these grimoires, often exposing their inconsistencies and questionable origins, while highlighting their reliance on supernatural beings and practices that were often rooted in superstition and fear.