This book presents three texts concerned with what is called in Tibetan the "Dzogchen" or, in English, "Great Completion" system of teaching that explains reality and how beings can return to it from their current, confused state. The texts explain the most profound level of that teaching being called "Nyingthig" or, in English, "Quintessence". In Tibet, there were several lines of transmission of this Quintessence Great Completion level...