大方廣佛華嚴經疏 6.38

6.38

第四二禪長行十法。初中二義：一內證真樂。經論共說樂，有五種，謂一因、二果、三苦對除、四斷受、五無惱害。無惱害樂更有四種，謂出家遠離樂、禪定適悅樂、菩提覺法樂、涅槃寂靜樂。今當第四。若通取受字兼禪定菩提，則含因果。言恒受者，以無所受受諸受故；若待境界，即非恒也。二「而能降」下，外建大義，降神現相除苦因果。此於涅槃體用障得解脫也。

Fourth, explaining the ten dharmas of the prose section for the second dhyāna [heavens]. In the first, there are two meanings: first, inwardly realizing true bliss. The sūtras and treatises jointly explain that bliss has five kinds: first, cause; second, result; third, counteracting suffering; fourth, severing feeling; fifth, non-affliction. Non-affliction bliss further has four kinds: the bliss of leaving home and seclusion, the bliss of the comfort of dhyāna, the bliss of awakening to phenomena in bodhi, and the bliss of the tranquility of nirvāṇa. Here it corresponds to the fourth. If one broadly takes the word "feeling" to also include dhyāna and bodhi, then it encompasses cause and effect. As for saying "constantly experiencing," it is because by experiencing all feelings through non-experiencing; if it depends on objects, it is not constant. Second, from "and able to descend" downward, externally it establishes great meaning, descending spiritually and manifesting marks to eradicate the cause and effect of suffering. This attains liberation from the obstacle regarding the essence and function of nirvāṇa.