This little book by C. G. Jung offers a compact and easily understandable introduction to the most important basic concepts of Jungian psychology, such as consciousness and the unconscious, archetype and individuation. The focus is on the effects of the unconscious on the conscious personality. Jung distinguishes between the personal unconscious, which is shaped by a person's life history, and the collective unconscious, in which archetypal human experiences are stored. Archetypes are soul energies that can strongly influence the ego in its feelings and behavior. With its clear explanations, the book helps to better understand the relationships between the ego and the unconscious--and thus oneself.