A leading expert on the teachings of C.G. Jung explores the connection between mind and matter, drawing on classic Jungian themes like archetypes, dreams, synchronicity, and more Twelve essays by the distinguished analyst Marie-Louise von Franz--five of them appearing in English for the first time--discuss synchronicity, number and time, and contemporary areas of rapprochement between the natural sciences and analytical psychology with regard to the relationship between mind and matter. This last question is among the most crucial today for fields as varied as microphysics, psychosomatic medicine, biology, quantum physics, and depth psychology.