十不二門指要鈔 2.126

2.126

二、至果下，遍逗由心證。證果之後，於體內不分之權實，而被機分隔說之。既理元不分，故此經稱理而會，如是施會自在者由契本因，因本若隔，果那得融？若欲契之，但觀一念。

Second, from "reaching the fruit" onward, universal accordance arises from mind-realization. After realizing the fruit, in regard to the expedient and real that are undivided within the essence, they are divided and preached in separation to be received by capacities. Since the principle is originally undivided, this sūtra accords with the principle and converges them. Such freedom in deploying and converging arises from tallying with the fundamental cause. If the causal root were separated, how could the fruit be fused? If one wishes to tally with it, merely contemplate a single thought-moment.