法華文句記 1.139

1.139

次釋「中」字，既在山城之中，因緣等四具如彼釋，今但消「中」字義耳。欲更說之，先約所表以具四悉：常好中道，赴欲也；升中天、中日降，為人也；中夜滅，對治也；說中道，第一義也。諸教皆有中道，但有有體無體之殊。本迹者，觀圓理本中也，示離斷常迹中也。今經是開顯之中，若約觀者，即空即中，具二中也。

Next, explaining the word "in" (or "amidst"): since they are amidst the mountain and city, the four [modes] such as causes and conditions are fully as explained there; now we merely interpret the meaning of the word "in." Wishing to explain it further, we first formulate the four siddhāntas with respect to what is signified: constantly delighting in the Middle Way accords with desires [the worldly siddhānta]; ascending to the mid-heavens and descending at midday is for persons; extinction at midnight is the therapeutic; expounding the Middle Way is the supreme truth. All teachings have a Middle Way, yet there is the distinction between having an essence and lacking an essence. Regarding origin and traces: contemplating the perfect principle is the origin's "middle"; demonstrating freedom from annihilation and permanence is the trace's "middle." The present sūtra is the "middle" of opening and revealing; if formulated in terms of contemplation, it is both empty and middle, possessing both middles.