The occult is a category of esoteric or supernatural beliefs and practices which generally fall outside the scope of organized religion and science, encompassing phenomena involving a 'hidden' or 'secret' agency, such as magic and mysticism. It can also refer to supernatural ideas like extra-sensory perception and parapsychology.

Éliphas Lévi Zahed, born Alphonse Louis Constant, was a French esotericist, poet, and writer. Initially pursuing an ecclesiastical career in the Catholic Church, he abandoned the priesthood in his mid-twenties and became a ceremonial magician. At the age of 40, he began professing knowledge of the occult. He wrote over 20 books on magic, Kabbalah, alchemical studies, and occultism.