One of the classic texts of Archetypal Theory and Criticism, it attempts to bring about a fundamental logic for psychology and psychotherapy independent from both philosophy or the natural sciences. The question which the author attacks in this volume is the most difficult in psychology because it ask about first principles by means of which any psychology can become possible. Yet throughout this intellectual tour-de-force, the author remains faithful to his profession: he was a practicing psychotherapist who never lost sight of the living soul.