Respecting the teaching and practice, whereas the Origin refers to the teaching and the Traces refers to the practice, Chih-i states that the teaching functions as the foundation for practice to arise, but without practice, one cannot attain an encounter with the teaching (from which the principle can be manifested). Therefore, the indispensability of these two parties renders a single inconceivable reality. (Vol. 2, Page 320)
The Profound Meaning of the Lotus Sutra: Tien-tai Philosophy of Buddhism