P’o-chi Hsien-pen (Destroying the Traces and revealing the Origin) is the function related to the Subtlety of the Original Cause. This is spoken of by Chih-i in terms of destroying the attachment of the Three Vehicles to the Traces. By unraveling the Traces concerning Śākyamuni Buddha’s recent enlightenment, his original attainment of Buddhahood from the incalculable past as the Origin is revealed. (Vol. 2, Page 447)