大般涅槃經義記 3.318

3.318

前中，初有兩行半偈以其二喻呪於一法，後之兩偈以其一喻況於一法。復就前中，初一偈半立喻顯法。喻中初偈甘露為喻，即約愚、智，明損、明益；後半以其毒藥為喻，亦約愚、智，明損、明益。下一偈合，於中，前半合上甘露，道言「無礙智甘露」者，此《涅槃經》於彼無礙智慧之人得名甘露，「所謂大乘」斥出其體。「如是大乘名亦毒藥」合後半偈，先牒向者，後句「大乘」下就明毒翻前甘露。

In the former part, first there are two and a half verses that use two analogies to illustrate one dharma; the latter two verses use one analogy to illustrate one dharma. Again, within the former, the first verse and a half sets up the analogies to reveal the dharma. In the analogies, the first verse takes ambrosia as the analogy, based on foolishness and wisdom to explain harm and benefit; the latter half-verse takes poison as the analogy, also based on foolishness and wisdom to explain harm and benefit. The next verse applies them: within it, the first half applies to ambrosia above; saying "the ambrosia of unobstructed wisdom" means that this *Nirvāṇa Sūtra* is called ambrosia for those persons of unobstructed wisdom; "that is to say, the Mahāyāna" points out its essence. "Such Mahāyāna is also called poison" applies to the latter half-verse, first citing what was just mentioned, and the latter phrase from "Mahāyāna" down directly explains poison, overturning the ambrosia above.