Jigten Sumgön (1143–1217) is the founder of the Drikung Kagyu school of Tibetan Buddhism. His nephew and disciple Chenga Sherab Jungne recorded the authentic biography on which all later biographies are based. In this life story, Jigten Sumgön’s path to liberation becomes discernible as the overcoming of all mental defi lements, faults and confusions. Through this, his closest disciples and other Tibetan and Indian saints recognise in their master the reincarnation of Nagarjuna and a perfect buddha. The brief biography of the author, Chenga Sherab Jungne, provides additional insights into the founding years of the Drikung Kagyu tradition.