the three sections of maha Ati / sandhi. Three Classes of the Great Perfection. The Mental Class {sems kyi sde} or chittavarga. the Spatial Class {klong gi sde} or dhatuvarga. and the Esoteric Instructional Class {man ngag gi sde} or upadeshavarga. three classes of the Great Perfection; the three series of Dzogchen teachings
three classes within Atiyoga
Three Sections of Dzogchen. After Garab Dorje established the six million four hundred thousand tantras of Dzogchen in the human world, his chief disciple, Manjushrimitra, arranged these tantras into three categories: the Mind Section emphasizing luminosity, the Space Section emphasizing emptiness, and the Instruction Section emphasizing their inseparability