大乘起信論義記 1.122

1.122

次、攝一切世出世法者，辨法功能。以其此心體相無礙，染淨同依，隨流返流唯轉此心，是故若隨染成於不覺，則攝世間法；不變之本覺及返流之始覺，攝出世間法。此猶約生滅門辨。若約「真如門者」，則鎔融含攝染淨不殊，故通攝也。下文具顯。

Second, "subsumes all mundane and supramundane dharmas" distinguishes the function of the dharma. Because the substance and characteristics of this mind are unobstructed, and defilement and purity share the same foundation, following the flow and reversing the flow are solely the transformation of this mind. Therefore, if it follows defilement to become non-enlightenment, it subsumes mundane dharmas; the unchanging innate enlightenment and the incipient enlightenment that reverses the flow subsume supramundane dharmas. This is still distinguished in terms of the gate of arising and ceasing. If in terms of the gate of tathatā, it melts together and contains them without defilement and purity being distinct, and therefore generally subsumes them. The text below fully reveals this.