“there is but the One Life—the Universal Life of God, in Whom it is an actual fact that “we live, and move, and have our being.” Mineral, plant, animal, and man—all, without exception—are manifestations of God, and this fact furnishes the true basis of brotherhood—a brotherhood which includes everything from the atom to the Sun, because all are emanations from God.”
Max Heindel, The Rosicrucian Cosmo-Conception, or, Mystic Christianity : an elementary treatise upon man’s past evolution, present constitution and future development
The word occult comes from the Latin word occultus (clandestine, hidden, secret), referring to “knowledge of the hidden” or “hidden knowledge”.
The term occult sciences was used in 16th-century Europe to refer to astrology, alchemy, and natural magic, which today are considered pseudosciences. The term occultism emerged in 19th-century France, amongst figures such as Antoine Court de Gébelin. It came to be associated with various French esoteric groups connected to Éliphas Lévi and Papus, and in 1875 was introduced into the English language by the esotericist Helena Blavatsky.
Throughout the 20th century, the term was used idiosyncratically by a range of different authors, but by the 21st century was commonly employed – including by academic scholars of esotericism – to refer to a range of esoteric currents that developed in the mid-19th century and their descendants. Occultism is thus often used to categorise such esoteric traditions as Spiritualism, Theosophy, Anthroposophy, the Hermetic Order of the Golden Dawn, and New Age.