Nietzsche described himself as the first psychologist of the West. His interpreters, however, have seldom regarded his works as contributions to psychology. This book gives the psychological perspective a central role and uses it as a guide through Nietzsche's aphoristic maze toward the center of his thought, method, aims and ramifications. Psychology thus serves as the path to his philosophy and leads to a reconstruction of his substantive theses, including the morality of positive power. By exploring Nietzsche's depth psychology in detail, the book clarifies his basic purpose: to entice readers into uncovering and reactivating their own sources of creative power.