"Edinger has greatly enriched my understanding of psychology through the avenue of alchemy. No other contribution has been as helpful as this for revealing, in a word, the anatomy of the psyche and how it applies to where one is in his or her process. This is a significant amplification and extension of Jung's work. Two hundred years from now, it will still be a useful handbook and an inspiring aid to those who care about individuation". -- Psychological Perspectives.