Dzogchen, meaning "great perfection" in Tibetan, is an advanced practice associated particularly with Bon, the native religion of Tibet, and the Nyingma School of Tibetan Buddhism. This book provides a study and translation of the "Authenticity of Open Awareness", a foundational text of the Bon Dzogchen tradition. The text is an important exposition on the Dzogchen contemplative traditions of Bon, and its translation offers a major contribution to contemporary understanding of Tibetan philosophical and religious traditions.