成唯識論述記 6.233

6.233

The Commentary states: The simile is that just as a water-clearing jewel can clear turbid water, turbid water is an analogy for the mind and so forth, and the clear jewel is an analogy for the substance of faith; because the jewel is placed [in it], the turbid water then becomes clear, and because faith is present, the mind accordingly becomes pure. If so, shame and the like should by analogy also be like this, since their intrinsic nature is pure; what difference is there then?