As potent as it is pithy, this short text outlines three sets of qualities required respectively by sages, bodhisattvas, and practitioners of the Mantrayāna. There is obvious overlap in the advice contained at each level, particularly ascending from the initial to the final qualities, which mirrors the central training of the three Buddhist vehicles essential to the Tibetan tradition.
Butön Rinchen Drub
Buton Rinchen Drub, a Sakya lama raised in a Nyingma family, was the eleventh abbot of Zhalu Monastery, from 1320 to 1356. Some enumerations list him as the first abbot, as he significantly expanded the institution. He was an important teacher of the Prajñāpāramitā, and a key lineage holder of the Guhyasamāja and Kālacakra tantras as transmitted in the Geluk tradition, and the Kālacakra, Hevajra and Sampuṭa tantras as transmitted in the Sakya tradition. He is generally credited as the creator of the Tibetan Buddhist canon, the Kangyur and Tengyur, and his History of Buddhism is still widely read. In addition to his Sakya training he also studied in the Kadam and Kagyu traditions.