大乘起信論義記 2.109

2.109

Second, within the broad illumination of the two enlightens, there are two parts: first, clarifying incipient enlightenment, and afterwards, clarifying innate enlightenment. Within the former there are three parts: first, a general indication of the two enlightens of cause and fruit; next, an extensive resort to the four marks to explain and establish it; and thereafter, from "Yet in truth there is no…" onward, clarifying that incipient is not different from innate.