Initiation, Human and Solar is book by Alice Bailey in which is explained her theory of the hierarchy of sacred entities, and the part initiation plays in that system. Initiation is presented as a growth of perception which serves as a guide to revelation and elucidation.

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Alice Bailey (1880-1949) was a writer of more than twenty-four books on theosophical subjects, and was one of the first writers to use the term New Age. Bailey was born in England, but she moved to the United States in 1907, where she spent most of her life as a writer and teacher. Bailey's works, written between 1919 and 1949, describe a wide-ranging system of esoteric thought covering such topics as how spirituality relates to the Solar System, meditation, healing, spiritual psychology, the destiny of nations, and prescriptions for society in general. She described the majority of her work as having been telepathically dictated to her by a Master of Wisdom, initially referred to only as "the Tibetan" or by the initials "D.K.", later identified as Djwal Khul.