These lectures, given by Solovyov in St. Petersburg in 1878, mark a seminal moment not only in Russian but also in world philosophy. Dostoyevsky, Tolstoy, and other luminaries were in the audience. It was recognized by everyone that something astonishing had occurred. The young philosopher, mystic, and visionary, Solovyov, had given unexpectedly concise, intellectual expression to the reality of the evolution of consciousness and religion. He had spoken movingly of the actualization of Divine Humanity in eternity and time, of the divine world and the fall of spiritual beings into sin, of the origin and meaning of the natural world, and the incarnation of Christ, leading to the redemption of the visible and invisible worlds in the full revelation of Divine Humanity.Sophia, whom Solovyov experienced three times in his life, inspires this great work. He conceives Sophia in a variety of ways: as the eternal ideal prototype of humanity, as the world soul actively engaged in actualizing this idea, and as the fully developed divine-human being. This Sophia is both the active principle in the process of creation and its realized goal: the kingdom of God.