成唯識論述記 4.305

4.305

述曰：由此道理故，必恒有真異熟心。此總結也，即是解八證中身受文也。無此解者難解彼文，自下第三。

The Commentary states: By this reasoning, therefore, there must constantly be a true ripening mind. This concludes the section in general; this is the explanation of the passage on bodily feeling among the eight proofs. Without this explanation, it would be difficult to understand that passage. From here on is the third [main section].