大般涅槃經義記 7.172

7.172

下喻菩薩聞過生厭。下以大河喻諸煩惱，煩惱漂沒故說為「河」，修中始覺故言「路值」，教起不貰名為「漂急」，無道能越名「無船筏」，厭過情深故言「怖畏」，修習諸行以為對治名「取種種草木為筏」。重觀得失名「更思惟」，觀住多失故言「設住當為蛇等之所危害」，慮進有苦故言「若渡筏不可依」，為斷煩惱乃至喪身名「沒水死」。捨退從進故言「寧死終不為彼蛇賊所害」，舉初取後且言蛇賊。修治擬障名「推草筏置之水中」，人依行進名「身倚上」。求心「手抱」，厭觀「脚蹋」，正斷「截流」，漸進名「去」。到大涅槃名「達彼岸」，受樂「安隱」，離苦「無患」，「心意泰然」顯前安隱，「恐怖消除」彰前無患。

Below allegorises the bodhisattva hearing of the faults and giving rise to revulsion. Below, the various afflictions are allegorised by a great river. Because afflictions drown and sweep away, they are called a 'river'; first awakening [to this] in the midst of practice is why it says 'encountering on the road'; when teachings arise without reprieve, it is called 'flowing rapidly'; having no path capable of crossing is called 'having no boat or raft'; revulsion at the faults being deep is why it says 'terrified'; cultivating practices to serve as an antidote is called 'taking various grasses and trees to make a raft'. Re-contemplating gain and loss is called 'further considering'; contemplating that dwelling holds many perils is why it says 'If I stay, I shall be harmed by the snakes and so forth'; worrying that advancing involves suffering is why it says 'If I cross, the raft cannot be relied upon'; even losing one's life in order to sever afflictions is called 'drowning in the water to death'. Abandoning retreat and following advancement is why it says 'Better to die, but never shall I be harmed by those snakes and thieves'; adducing the beginning and taking the end, it just says 'snakes and thieves'. Cultivating antidotes to prepare against obstacles is called 'pushing the grass raft and placing it into the water'; relying on practice to advance is called 'the body resting upon it'. Seeking with the mind is 'embracing with the hands'; contemplating with revulsion is 'treading with the feet'; correct eradication is 'cutting off the current'; advancing gradually is called 'going'. Arriving at great nirvāṇa is called 'reaching the other shore'; experiencing bliss is 'peaceful and secure'; leaving suffering is 'free from calamity'; 'the mind being at ease' reveals the aforementioned peaceful security; 'terror eliminated' manifests the aforementioned freedom from calamity.