大般涅槃經義記 2.9

2.9

別奪果中，初辯今真，「汝今遇」下約真奪偽。前中「云何莊嚴法城」，問以起發。涅槃正法似世寶城，法從喻稱，名法寶城。「此法寶城云何莊嚴」下對顯之。「具種種德」，總顯莊嚴。「戒、定、智慧為牆塹」等，別顯莊嚴。戒能防非，故說為牆；定意深靜，說之為塹；慧能觀照，名為埤堄。就下約真奪偽之中，「汝今遇是，不應取此虛偽物」者，正勸捨偽。「譬如」已下明取偽失，先喻、後合；「汝諸」已下，結勸捨偽。

In individually revoking the fruit, first he explains the present truth; from "You now having encountered..." downward, he relies on the truth to revoke falsehood. In the former, "How is the Dharma castle adorned?" asks in order to initiate [the discourse]. The true Dharma of nirvāṇa resembles a mundane treasure castle; named after the metaphor, it is called the jewel castle of Dharma. From "How is this jewel castle of Dharma adorned?" downward, he explains it in response. "Endowed with diverse virtues" generally reveals the adornments. "Precepts, concentration, and wisdom are its walls and moats..." and so forth individually reveals the adornments. Precepts can ward off wrongdoing, hence they are called the wall; concentration is deep and tranquil, so it is called the moat; wisdom can illuminate and observe, so it is called the parapet. In what follows below, where he relies on the truth to revoke falsehood: "You now having encountered this, you should not grasp these false things" directly exhorts discarding falsehood. From "For example..." downward clarifies the loss in grasping falsehood, first with a metaphor and then an application. From "You all..." downward concludes with the exhortation to abandon falsehood.