Aion, a major work from Jung's later years, has long been a source of fascination for a wide variety of scholars and thinkers. Presented here are two substantial commentaries concerning this rich and complex text by two important figures in Jung's life and work: Barbara Hannah and Marie-Louise von Franz. This is the first volume in a series edited by Emmanuel Kennedy-Xypolitas, "Polarities in the Psyche," focusing on the broad theme of the opposites...