起信論疏筆削記 8.61

8.61

論　依此等者，依體立名也，謂心體寂滅，無有變改。從本已來可軌則故，名之為法；是體依聚故，名之為身。今依此體而立覺名者，以顯法身非是一向凝然寂滅、無知無覺也。又顯此覺非是有為生滅之法，故約法身以立。是則一體之上，寂故名法身、照故名本覺。所言依者，但是依約之義，不同草木依根有苗，分能所也。亦不同依如來藏有生滅心，有真妄也。此乃一體真實，但約此體上靈照之義便，名本覺也。

Regarding the treatise's "in reliance upon this" and what follows: this establishes the name in reliance upon the essence. It means that the mind-essence is quiescent and free from alteration. Because it has been a norm [to follow] from the very beginning, it is named "dharma"; and because it is that which the essence relies upon and aggregates, it is named "body" (kāya). Now, establishing the name "enlightenment" in reliance upon this essence serves to show that the dharmakāya is not merely a frozen quiescence devoid of knowing and awareness. It also reveals that this enlightenment is not a conditioned, arising-and-ceasing dharma; hence it is established with reference to the dharmakāya. Thus, upon a single essence, because of quiescence it is named dharmakāya, and because of illumination it is named original enlightenment. What is called "relying" is merely the sense of relying on or taking reference to; it is not like the sprouts of plants and trees that rely on roots, dividing into subject and object. Nor is it like relying on the tathāgatagarbha to have the arising-and-ceasing mind, which divides into the real and the false. This is a single real essence; it is merely with reference to the sense of spiritual illumination upon this essence that it is conveniently named original enlightenment.