金剛經纂要刊定記 2.153

2.153

前三句中，每句皆上法下喻。意明煩惱如大河，難可度故。生死如此岸，有情居故。涅槃如彼岸，諸佛住故。則慧是能離能度能到，生死等是所離所度所到。若欲離此到彼，必須渡於中流。此約四諦說之，理則明矣！知苦是離此岸，斷集、修道是渡中流，證滅是到彼岸也。此順小乘義說。下經令入大乘無餘涅槃，即須離二種生死此岸，乘六度船筏，度三障中流，到二涅槃彼岸。

In the preceding three sentences, each sentence has the dharma above and the metaphor below. The intention is to clarify that afflictions are like a great river, because they are difficult to cross. Saṃsāra is like this shore, because sentient beings abide there. Nirvāṇa is like the other shore, because the Buddhas abide there. Thus wisdom is what is capable of departing, crossing over, and reaching; saṃsāra and the rest are what are departed from, crossed over, and reached. If one wishes to depart from this and reach that, one must cross the midstream. Explaining this according to the four truths, the principle then becomes clear! Knowing suffering is departing from this shore; abandoning the origin and cultivating the path are crossing the midstream; realizing cessation is reaching the other shore. This is explained following the meaning of the Hīnayāna. The sūtra below causes one to enter the Mahāyāna nirvāṇa without remainder, which requires departing from the "this shore" of the two kinds of saṃsāra, boarding the raft of the six perfections, crossing the midstream of the three hindrances, and reaching the "other shore" of the two nirvāṇas.