While not all aspects of Carl Gustav Jung's work have aged well, many of his ideas remain consistent with current concepts in behavioral psychology and neuroscience. Psychology of the Spirit reviews the lasting effects of Jung's work and how it integrates with modern neuroscience, cognitive and behavioral studies, and Christian theology. It combines the mystical insights developed by Eastern Orthodox Christian theology with Jung's vision of the psyche and the concept of the collective unconscious and its archetypes. Though written as a contribution to the field of psychology and as a tool for clinical practice, it is also accessible to lay readers interested in the relationship between the mind and the brain.