The Russian philosopher Nikolai Berdyaev (1874-1948) was one of the greatest religious thinkers of the twentieth century. His philosophy goes beyond mere thinking, mere rational conceptualization, and tries to attain authentic life itself: the profound layers of existence that are in contact with God's world. Berdyaev directed all of his efforts, philosophical as well as in his personal and public life, at replacing the kingdom of this world with the kingdom of God. According to him, we can all attempt to do this by tapping the divine creative powers which constitute our true nature. Our mission is to be collaborators with God in His continuing creation of the world. This is what Berdyaev said about himself: "Man, personality, freedom, creativeness, the eschatological-messianic resolution of the dualism of two worlds - these are my basic themes." In Freedom of the Spirit, Berdyaev tells us that the creative development of the spirit and the free exercise of man's powers can be conceived only as the free cooperation of man with the work of God. Creative spiritual development represents a new principle which signifies an offering of human freedom to God, an offering which God expects from us. The life of the spirit is a creative and dynamic process. Spiritual development is possible only because there is freedom. Spiritual development is not movement on the plane of the external world, but the bringing to birth of forces which lie hidden in the inner depths of existence. To quote Berdyaev, "the spiritual world is like a torrent of fire in free creative dynamism." "Nikolai Berdyaev's writings are always insightful, penetrating, passionate, committed-expressions of the whole person. They are as intensely alive now as when they were first written."-Richard Pevear, translator of War and Peaceand The Brothers Karamazov "Nikolai Berdyaev's writings retain their freshness as vehicles for thinking not just about the future of Russia, but about the spiritual challenges facing the modern world."-Paul Vallier, author of Modern Russian Theology: Bukharev, Soloviev, Bulgakov "Nikolai Berdyaev is one of the few who have found the Christian answer, and yet do not cease to question with those whose lives are still torn asunder by disbelief, doubt, and sufferings; one of the few who dare to be, as thinkers, Christians and, as Christians, thinkers."-Evgeny Lampert, author of The Apocalypse of History Boris Jakim has translated and edited many books in the field of Russian religious thought. His translations include S. L. Frank's The Unknowable, Pavel Florensky's The Pillar and Ground of the Truth, Vladimir Solovyov's Lectures on Divine Humanity, and Sergius Bulgakov's The Bride of the Lamb.