大乘起信論裂網疏 5.62

5.62

彼方便行，略有四種：一、行根本方便，謂觀一切法本性無生，離於妄見，不住生死；又觀一切法因緣和合，業果不失，起於大悲，修諸善行，攝化眾生，不住涅槃。以真如離於生死、涅槃相故，此行隨順（真如）以為根本，是名行根本方便。

"Those practices of skillful means are briefly of four kinds: First, the fundamental skillful means of practice: contemplating that the intrinsic nature of all dharmas is unborn, separating from deluded views, and not abiding in birth and death; further contemplating that all dharmas are assembled through causes and conditions, karma and its fruits are not lost, giving rise to great compassion, cultivating all good practices, and gathering and transforming sentient beings, not abiding in nirvāṇa. Because tathatā is separated from the marks of birth-and-death and nirvāṇa, this practice accords with [tathatā] as its foundation; this is called the fundamental skillful means of practice."