The Secret Doctrine is a book written by Helena Blavatsky in 1888. It is considered to be one of the foundational texts of the Theosophical movement. The term 'Cabala' is used to refer to a set of esoteric teachings found within Judaism, which are believed to have been passed down orally from ancient times. Cabala is often associated with mysticism and the occult, and is believed to contain hidden knowledge about the divine and the universe.