起信論疏筆削記 17.28

17.28

First, indicating the basis of the grounds: because the text says, "What sensory realm is realized? Namely, tathatā." This means that tathatā is the objective realm relied upon by the ten grounds. However, "ground" is a name revealed through metaphor, using it to analogize how true wisdom can give rise to noble dharmas. Now, in terms of tathatā being that upon which wisdom relies, it is called the basis of the grounds.