The function “Abiding in the Traces and Employing the Origin” (Chuchi Yung-pen) signifies the Subtlety of the Original Life-span and the Subtlety of the Original Retinues. This is because by abiding in the Traces, the Buddha is able to manifest birth and death numerous times, and this life-death is only possible because it is derived from the Original Life-span of the eternal Buddha. Moreover, the Traces are represented by the disciples of the Three Vehicles, and these disciples are actually Original Retinues. Therefore, this function is linked to the meanings of Original Life-span and Original Retinues. (Page 121)