首楞嚴義疏注經 1.453

1.453

妄執未融，六情殊隔；真智一發，法界洞然，誰為自他？故成一界。即欲說如來藏心之先瑞也。

When false clinging is not yet dissolved, the six emotions are distinct and divided; once true wisdom arises, the dharmadhātu is lucid and clear—who is self and who is other? Thus they become a single realm. This is precisely the auspicious sign foreshadowing the explanation of the mind of the tathāgatagarbha.