大方廣圓覺修多羅了義經略疏 2.181

2.181

From here down is the fourth: briefly differentiating the stages of practice and realization. Having revealed the source of enlightened wisdom and thoroughly investigated the root of saṃsāra, it is already known that in perfect enlightenment ordinary people and sages do not differ; however, with respect to the mind that accords with perfect enlightenment, how distinctions exist from ordinary person to sage has not yet been delineated, so it is clarified next. "Briefly differentiating" means: the three sagely stages (sanxian) are unified into one stage, and the ten grounds (bhūmis) and equal enlightenment are combined into one gate. Practicing is practicing perfect enlightenment, and realizing is realizing perfect enlightenment; perfect enlightenment is without differentiation, yet the stages and grounds are clarified in reference to cultivated wisdom. The text has four parts: the first of the first three.