大方廣圓覺修多羅了義經略疏 2.1348

2.1348

如來藏即圓覺在纏之名。妄不能變，名為自性；隨緣起妄，名為差別。又空如來藏、不空如來藏，即是差別。

The tathāgatagarbha is the name for perfect enlightenment while still enveloped in defilements. That delusion cannot alter it is called "own-nature"; that it gives rise to delusions according to conditions is called "distinction." Moreover, the empty tathāgatagarbha and the non-empty tathāgatagarbha are precisely the distinctions.