The book explores the background and theoretical implication of logotherapy by looking back at the bloody and criminal history of Nazi Germany. While looking into the meaning of rehabilitation among people in extremis, this book bears the most glorious testimony in the history of human nature. Logotherapy is also known as The Third Viennese School of Psychotherapy after Freudian psychoanalysis and Adlerian psychology. This book was named one of the Ten Most Influential Books in America by the Library of Congress.