An amazing book you believe the philosophy is incomprehensible and Dr. Ferry proves you wrong! he explains, tells a bit, still very tolerant currents of ideas that are not hers. Many didacticism, development in range of the reader. How I would like to be a student of such a teacher. This book is very interesting vraimment, it remains on my nightstand with two works of Alexandre Jolien. What to do to play well on all teens (who are at an age where one has questions) but also to all. This book responds well to its title: "aprendre to live." So please stop and run your Prozac!