起信論疏筆削記 3.7

3.7

"Opening the gates relying on the mind": because the treatise says, "Relying on the dharma of the One Mind, there are two gates." "Gate of tathatā": within it, there are [the aspects] beyond words and according with words; within that according with words, there are again empty and non-empty, as fully explained below. "Part of the sudden teaching": because this gate explains that the nature of mind is neither arising nor ceasing, up to being beyond words and cut off from thoughts, it corresponds to this teaching. "Esoterically explained": as the Heart Sūtra says, "These dharmas' mark of emptiness: neither arising nor ceasing, neither defiled nor pure, neither increasing nor decreasing," etc., which are the marks of tathatā. Although it clarifies its marks, it does not specifically reveal the essential nature of tathatā, hence it says "esoterically explained." In principle there is truly no difference, hence it is correlated now.