It was the Chinese philosopher monk Chih-i (531-97) who formulated a system of religious philosophy on the basis of the book Hokke-kyō or Lotus; it is known as the school of Tendai (Chinese, Tientai), from the name of the mountain where he lived. The chief import of the book is to interpret the person of Buddha as a manifestation of eternal metaphysical entity, and thus to synthesize the two aspects of his being, his actual manifestation or incarnation in human life, and the ontological foundation of his real entity.