大方廣圓覺修多羅了義經略疏 2.859

2.859

若以同喻反合，應云：「無別有我知我盡者。」今翻喻勢順前正釋，故云正合。

If it were matched inversely using the same analogy, it should say: 'There is no other self that knows the self has ended.' Now, reversing the thrust of the analogy accords with the preceding direct explanation; hence it is called 'directly matching.'