大乘起信論義疏 1.36

1.36

言「是二門皆各總攝一切法」者，有二義：一義云：心真如中皆攝出世間一切法；心生滅中皆攝世間一切法，故皆名總攝也。二義云：心真如中皆攝世間出世間一切法，心生滅中亦爾。何者？雖真如不隨緣，染淨所依、諸法之體，如影依形，故言各攝。心生滅中，隨淨緣者轉理成行，隨染成妄，故言皆攝。

The statement "these two doors each comprehensively encompass all dharmas" has two meanings: One meaning says: within the mind as tathatā, all supramundane dharmas are encompassed; within the mind as arising and ceasing, all mundane dharmas are encompassed; therefore both are called comprehensively encompassing. The second meaning says: within the mind as tathatā, all mundane and supramundane dharmas are encompassed; within the mind as arising and ceasing, it is also like this. How so? Although tathatā does not accord with conditions, it is that upon which defilement and purity rely, the essence of all dharmas, like a shadow relying on a form; therefore it is said that each encompasses. Within the mind as arising and ceasing, according with pure conditions transforms principle into practice, and according with defiled conditions becomes the false; therefore it says they both encompass.