A bold exploration of the reintegration of rationality and intuition, science and soul, to foster individual and planetary healing During the scientific revolution, science and soul were drastically separated, propelling humanity into four centuries of scientific exploration based solely on empiricism and rationality. But, as scientist and ecologist Stephan Harding, Ph.D. demonstrates in detail, by reintegrating science with profound personal experiences of psyche and soul, we can reclaim our lost sacred wholeness and help heal ourselves and our planet. The book begins with compelling introductions to depth psychology, alchemy, and Gaia theory--the science of seeing the Earth as an intelligent, self-regulating system, a theory pioneered by the author's mentor James Lovelock. Harding then explores how alchemy, as understood through the depth psychology of C. G. Jung, offers us powerful methods of reuniting rationality and intuition, science and soul. He examines the integration of important alchemical engravings, including those from L'Azoth des Philosophes and the Rosarium Philosophorum, with Gaian science. He shows how the seven key alchemical operations in the Azoth image can help us develop deeply transformative experiences and insights into our interconnectedness with Gaia. He then looks at how the four components of the living Earth--biosphere, atmosphere, hydrosphere, and lithosphere--mesh not only with the four elements of alchemical theory but also with the four functions of consciousness from depth psychology. Woven throughout with the author's own experiences of Gaia alchemy, the book also offers guided meditations and contemplative exercises to open your receptivity to messages from the biosphere and help you develop your own Gaian alchemical way of life, full of wonder and healing.