The Kybalion by Three Initiates is a book published in 1908 that claims to transmit the teachings of Hermes Trismegistus. Presenting seven Hermetic principles, including mentalism, correspondence, and polarity, it blends ancient philosophical concepts with New Thought movement ideas. While sharing traits with classical Hermetic texts, scholars note its deeper roots in early twentieth-century occultism. This modern mystical work has profoundly influenced New Age thinking, though its connection to authentic ancient Hermeticism remains contested.