The Self and the Quintessence explores Jung’s work on number symbolism and the alchemical journey and considers how they act as metaphors underpinning theories about the development of the self and individuation. It goes on to consider the implications of these dynamics in terms of the symbol of the quintessence and what this represents psychologically. Initially exploring number symbolism and the way numbers can express dimensionality and emergence, this book explores the theories which underpin Jung’s ideas about the self and its complexity, including the dynamics of opposites, the transcendent function, and the symbol of the quaternity (fourness). The book then explores the symbol of the quintessence from a theoretical and clinical perspective and also in relation to its use in alchemy and physics. It goes on to consider the symbolic and psychological significance of the quintessence in relation to complexity, emergence, individuation, wholeness, truth and the spirit of matter. Extending Jungian ideas to explore the archetypal symbol of the quintessence and its psychological significance, will be of great interest to Jungian academics, researchers and clinicians, and anyone looking to expand their knowledge and understanding of Jungian psychology.