Here is a book to read and reread. For those who practice Dzogchen, this book is a true BIBLE. The preface by Matthieu Ricard is accessible to all, simple and profound at once. The text and commentary are all we need to know to practice the path. We no longer boasts the immense merits of Philippe Cornu, for connoisseurs, remains a valuable translator himself practicing Nyingma, how it feels as we perceive his deep understanding of the text and the skill with which it makes this text accessible to us Westerners of the 21st century. A true treasure!