起信論疏筆削記 3.36

3.36

又大下，二、別釋大乘也。就義等者，論云：所言義者，則有三種。云何為三？一者體大，謂一切法真如平等，不增減故；二者相大，謂如來藏具足無量性功德故；三者用大，能生一切世間出世間善因果故。就人等者，論云：一切諸佛本所乘故，一切菩薩皆乘此法到如來地故。準本疏說，於三大之中，體相是所乘，用大為能乘。三大之中唯一心轉，是故亦大亦乘，持業釋也。

In "Moreover, great..." below, second, specifically explaining Mahāyāna. As for "in terms of meaning, etc.": the treatise states, "What is called meaning has three kinds. What are the three? First is the greatness of essence, meaning that the tathatā of all dharmas is equal, neither increasing nor decreasing; second is the greatness of attributes, meaning that the tathāgatagarbha is replete with immeasurable virtues of its nature; third is the greatness of function, being able to produce all mundane and supramundane wholesome causes and effects." As for "in terms of persons, etc.": the treatise states, "Because it is what all Buddhas originally rode; because all bodhisattvas ride this dharma to arrive at the Tathāgata ground." According to the root commentary, among the three greatnesses, essence and attributes are what is ridden, while the greatness of function is that which rides. Among the three greatnesses, only the One Mind turns; therefore it is both great and a vehicle, an appositional compound (karmadhāraya).