成唯識論述記 6.442

6.442

述曰：下顯正也。此中十法遍一切善，輕安不遍，何以知者？初以理證。輕安調暢，要除麁重。散位麁重，體不無故，無輕安也。以文證者。

The Commentary states: Below reveals the correct view. Among these, the ten dharmas pervade all wholesome minds, whereas pliancy is not pervasive. How is this known? First, it is proven by reason: Pliancy is harmonization and fluency, which necessarily requires the removal of coarse heaviness (dauṣṭhulya). In distracted states, coarse heaviness is not substantially absent, and therefore pliancy is absent. As for proving it through textual authority: