Dzogchen 

(rdzogs-chen), Tib., lit., “great perfection”; the primary teaching of the Ny­ingma school of Tibetan Buddhism. This teaching, also known as ati-yoga (extraordinary yoga), is considered by its adherents as the de­finitive and most secret teaching of Shākyamuni Buddha. It is called “great” be­cause there is nothing more sublime; it is called “perfection” because no further means are nec­essary. According to the experience of dzog­chen practitioners, purity of mind is always present and needs only to be recognized. The tradition of dzogchen was brought to Tibet in the eighth century by Padmasambhava and Vimilamitra; in the 14th century it was synthe­sized by Longchenpa into a unified system. The condensation of this system by Jigme Ling­pa (1730–98) remains an authoritative expres­sion of the great-perfection tradition up to the present day.