Tertium Organum
P. D. Ouspensky
Kessinger Publishing
1920. The Third Canon of Thought and a Key to the Enigmas of the World.  Translated from Russian. Introduction by Claude Bragdon. The Mystery of Time and Space; Shadows and Reality; Occultism and Love; Animated Nature; Voices of the Stones; Mathematics of the Infinite; The Logic of Ecstasy; Mystical Theosophy; Cosmic Consciousness; The New Morality; Birth of the Superman.