This collection, intended for the advanced Buddhist practitioner who has received initiation from a qualified master, provides the essential instructions of Dzogchen, or Great Perfection, practice. Written with a clear simplicity that belies their profundity, the teachings give practical and pointed advice on how students should meditate and behave in ordinary life. The work begins with an extensive reflection on the problem of self-clinging and the analytical meditation designed to uproot it, and proceeds to more specific instructions for the mind practice itself.