起信論疏筆削記 2.29

2.29

定性等者，三聚五性一切眾生皆有如來藏心，總皆成佛。故《涅槃經》云：凡有心者，定當作佛。《圓覺》云：有性無性齊成佛道。上皆明所詮之法。方盡下，判為了義。詮法窮源，故云至極也。對前未盡，終於始故，名為終教。非同法相，故云實理。分教不了，乃屬於權。此中了義，故云實教。

"Those of fixed nature, etc.": all sentient beings across the three groups and five natures possess the mind of the tathāgatagarbha, and all altogether attain Buddhahood. Therefore, the Mahāparinirvāṇa-sūtra says: "All who possess mind are bound to become Buddhas." The Yuanjue jing says: "Those with nature and those devoid of nature equally realize the Buddha-path." The above has all clarified the dharma that is expressed. "Only then exhausting..." judges this to be the definitive meaning. Expressing the dharma and exhausting its source, it is therefore called "reaching the ultimate." In contrast to the preceding [teachings] which did not exhaust it, reaching the final end of what was initial, it is named the final teaching. Not being the same as [mere] marks of dharmas, it is called "the real principle." The differentiated teaching is non-definitive, thus belonging to the provisional; this [teaching] is the definitive meaning, hence it is called the real teaching.