四分律行事鈔資持記 1.49

1.49

遮戒中，初明緩急。制即是急，開即是緩。對前性戒，義立四句。一文緩義急，性中開也。二文急義緩，遮中制也。（以非性業隨緣開故。）三俱急者，性中制也。四俱緩者，遮中開也。豈非下，正示興意。上明護俗；大慈下，明制道。道既無失，俗則生善；一制兩得，權巧在茲。《涅槃》所謂息世譏嫌，即其義也。枉坑者，枉謂邪曲，以於僧起謗，必墮邪道，永無有出，喻之若坑；或可約報，即喻苦趣。

Regarding prohibited precepts, it first clarifies strictness and relaxation. Prohibition is strictness, while exception is relaxation. In contrast to the preceding intrinsic precepts, four propositions are conceptually established: 1. The text is relaxed while the meaning is strict—exceptions among intrinsic [precepts]. 2. The text is strict while the meaning is relaxed—prohibitions among prohibited [precepts] (because they are not intrinsic karmas and are exempted according to conditions). 3. Both are strict—prohibitions among intrinsic [precepts]. 4. Both are relaxed—exceptions among prohibited [precepts]. The text from "Is it not..." downward directly shows the intent behind their arising. The above clarifies protecting the laity; the text from "Great compassion..." downward clarifies regulating the path. When the path incurs no loss, the laity generates goodness; a single prohibition achieves both, and skillful means reside herein. What the Nirvāṇa Sūtra calls "calming worldly mockery and suspicion" is precisely this meaning. "Pit of injustice": "injustice" refers to deviance and crookedness, because giving rise to slander against the saṃgha will inevitably lead to falling into evil paths with never an escape, which is likened to a pit; alternatively, in terms of retribution, it is an analogy for the painful destinies.