Kahlil Gibran’s The Prophet (1923) is one of the best-selling books of all time: Elvis Presley’s well-worn annotated copy of The Prophet was found posthumously among his effects. Gibran, a popular Lebanese American poet, artist, and mystic remained fixed in the collective spiritual imagination for decades; Gibran, a Maronite Christian, included other religions, Sufi mysticism, Jungian psychology, Buddhism, and Theosophy in his mix.