金剛般若經贊述 2.307

2.307

「若來」者，謂成道來；「若去」者，入滅去；「若坐」者，說法利益時；「若臥」者，謂唱滅相。化身有此，而法身無，故云無所從來，亦無所去也。如天上月，影現水中，水清即現，水濁便隱，月體本無來去，由水致有生滅；法身本湛寂，由心故見去來也。子云，法身本無來，由眾生向佛故見來，此即不來來，猶如趕遠質以臨臺，睇影顏而府己也。法身本無滅，眾生厭佛故，不去之中而見去，猶如汎駛舟而東邁，矚凝沼而西流，此即不去去也。

“If he comes” refers to coming when achieving enlightenment; “if he goes” refers to going upon entering cessation; “if he sits” refers to the time of preaching the Dharma and benefiting others; “if he lies down” refers to announcing the mark of cessation. The manifestation body has these, whereas the dharmakāya lacks them; hence it says “he comes from nowhere and goes nowhere.” It is like the moon in the sky casting its reflection upon the water: when the water is clear, it appears; when the water is turbid, it is hidden. The body of the moon originally has no coming or going; it is due to the water that arising and perishing appear. The dharmakāya is fundamentally serene and quiescent; it is due to the mind that coming and going are seen. A master says: The dharmakāya fundamentally has no coming; it is because sentient beings face toward the Buddha that they see him come—this is “coming without coming,” just like hurrying to an elevated terrace to look out into the distance, gazing at one's reflected countenance and bowing oneself down. The dharmakāya fundamentally has no extinction; it is because sentient beings grow weary of the Buddha that in the midst of non-going they see him go, just like sailing on a swift boat traveling east, looking at a calm pond and seeing it flow west—this is “going without going.”