維摩經玄疏 4.108

4.108

二、本高迹下，本高即是真身之極，最上無過；迹下，應同下四十一地之像。又，示現九道之形聲也，而不得言本下迹高者，妙覺法身之本，更無勝地法身之可下也；亦不得言本迹俱下者，更無上地真、應二身之高也。譬如十五日月光明圓滿，過此更無圓滿之光過十五日月也。

2. Origin is higher and trace is lower: origin being higher means it is the culmination of the true body, the supreme, than which there is nothing higher; trace being lower means responding by conforming to the images of the forty-one stages below, and also manifesting the forms and voices of the nine paths. One cannot say that "origin is lower and trace is higher," because in the origin of the dharmakāya of wondrous enlightenment there is no longer any dharmakāya of an even superior ground to which it could be lower; nor can one say that "both origin and trace are lower," because there is no longer any true or responsive body of a higher ground above it. It is like the light of the moon on the fifteenth day being complete and full: beyond this there is no full light that surpasses the moon of the fifteenth day.