大乘起信論義記 3.18

3.18

○第二、「所謂」下，廣顯緣起差別相，內有二：初、顯前緣起體相；二、「不了一法義者」下，更重料簡。初中有三：初、所謂心性等，釋上不變之義。

Second, from "What is called" downward, extensively revealing the distinct characteristics of pratītyasamutpāda, within which there are two parts: first, revealing the previous essence and characteristics of pratītyasamutpāda; second, from "One who does not comprehend the meaning of the single Dharma" downward, reconsidering and examining further. In the first part there are three: first, "what is called the mind-nature", and so forth, explains the above meaning of unchanging.