大般涅槃經集解 59.56

59.56

案僧亮曰：上云涅槃無生無諸有，如來即涅槃，而言王宮之生、雙樹之滅，謂以出動為生、入寂為滅，應物之迹也。何故？入禪定窟者，將顯現滅之旨以益當時，故發問也。寶亮曰：勸行佛所入定，為化眾生得無相涅槃也。

Sengliang comments: "Above it was said that nirvāṇa is free from production and free from all existences, and that the Tathāgata is identical to nirvāṇa. Yet speaking of birth in the royal palace and extinction at the Twin Trees means taking emerging into activity as birth and entering tranquility as extinction—these are the traces responding to beings. For what reason? Entering the cave of meditative concentration intends to reveal the purport of manifesting extinction to benefit that time, which is why the question is raised." Baoliang comments: "This encourages practicing the concentration entered by the Buddha, in order to transform sentient beings to attain signless nirvāṇa."