Chu-pen Hsien-pen (Abiding in the Origin and revealing the Origin) is the function related to the Subtlety of the Original Land. This is spoken of by Chih-i in terms of the original intention of the Buddha. The Buddha abides eternally in the Original Land of Sahā in revealing his original body dharmakāya. (Vol. 2, Page 447)
The Profound Meaning of the Lotus Sutra: Tien-tai Philosophy of Buddhism