Carl Gustav Jung never produced a systematic treatment of his own work - he was always moving forward. His assistant-of-many-decades, Carl Alfred Meier, made it his life-task to gather and present in detail the various aspects of Jung's far-reaching discoveries. This final volume of Meier's work addresses the human personality in its encounters between consciousness and the unconscious, a process referred to as individuation. In describing such encounters, the author extensively explains the notion of Jung's psychological types.