Masao Abe's and Steven Heine's article analyzes the origins of Dōgen's interest in being-time when he was a young monk on Mount Hiei, the headquarters of the Tendai school of Buddhism. According to the 1753 Kenzeiki (建撕記) traditional biography of Dōgen, he became obsessed by doubts about the Tendai concepts of hongaku (本覚, original awakening) that all human beings are enlightened by nature, and shikaku (始覺, acquired awakening) that enlightenment can only be achieved through resolve and practice. Both exoteric and esoteric Buddhism teach the original Dharma-nature and innate self-nature. If that were true, why have the Buddhas of past, present, and future awakened the resolve for and sought enlightenment through ascetic practices? (1988: 2). Dōgen's doubt eventually led him to travel to Song dynasty China to seek a resolution, which was dissolved through the enlightenment experience of shinjin-datsuraku (身心脱落, casting off of body-mind) when he was a disciple of Rujing (1162-1228).