For students of occultism, esoteric philosophy, and high magic, the name Eliphas Lévi holds immense weight. Often considered the father of modern occultism, Lévi bridged the gap between ancient hermetic traditions and 19th-century mysticism. Among his prolific works, O Grande Arcano (The Great Secret) stands as a profound testament to his later, more mature thoughts on magic, religion, and society.

Lévi was the first major writer to connect the 22 Major Arcana of the Tarot directly to the 22 letters of the Hebrew Alphabet. He claimed that the Tarot was not a game, but a "philosophical machine" that contained all of human knowledge. If you have ever read a Tarot book linking The Fool to Aleph or The Magician to Beth, you are seeing Lévi’s influence.

Lévi argues that the "Great Arcanum" is the absolute science of good and evil. To know it is to achieve a state of "Man-God," where the soul is perfectly balanced between truth and justice.