Fei-san Hsien-i (Abandoning the three and revealing the one) is the function related to the Subtlety of Expounding the Dharma. The above-stated first step destroys disciples’ attachment to the three teachings. In Chih-i’s view, the purpose of the previous refutation is to further abandon these three teachings with the revelation of the One Vehicle, in order to prevent beings in the future time from being attached to them once again. This abandonment is associated with the Buddha’s teaching, for without the teaching, the necessity of abandoning the three teachings will not be made clear. (Vol. 2, Page 444-445)