大方廣圓覺修多羅了義經略疏 1.179

1.179

方者，就法得名，軌持為義，軌生物解，任持自性。持自性者，一切眾生皆有本覺，雖流浪六道受種種身，而此覺性不曾失滅。生解者，眾生悟入知見，雖因善友開示，然其智解從覺性生，如水土之潤生穀等牙。牙從種生，不從水土。故文云：「圓覺流出菩提、涅槃及波羅蜜，教授菩薩。」

"Expansive" (fang, method/norm) receives its name with respect to the Dharma, taking norm and maintenance as its meaning: guiding to produce understanding in beings, and maintaining its own nature. "Maintaining its own nature" means that all sentient beings possess original enlightenment; although they wander in the six destinies and assume various bodies, this enlightened nature is never lost or extinguished. "Producing understanding" means that when sentient beings awaken and enter into [buddha-]knowledge and vision, although they rely on the instruction of good friends, their cognitive understanding arises from the enlightened nature, just as moisture from water and soil causes the sprouts of grain and the like to grow. The sprout arises from the seed, not from the water and soil. Thus the text states: "Perfect enlightenment flows out as bodhi, nirvāṇa, and the pāramitās, teaching and instructing bodhisattvas."