大乘起信論裂網疏 2.51

2.51

"Surpassing the bodhisattva stages" refers to the final thought of equal awakening, entering the diamond-like samādhi (vajropamasamādhi). The untainted wondrous observing wisdom of the emptiness of dharmas is called the ultimate path. From first realizing the dharmakāya onwards, one progresses incrementally, reaching fulfillment here, causing all tainted seeds within the vipāka-consciousness to be abandoned without remainder, transforming it into the amalavijñāna, whereupon it suddenly accords with the great round mirror wisdom; hence it is said, "with one thought in accord, the awakening mind first arises." "Only then is it named awakening" explains the meaning of ultimate initial awakening. "Far leaving behind the marks of awakening" explains the meaning of its being nothing other than original awakening, with no separate awakening arising. "Subtle conceptual differentiation is ultimately and forever exhausted" means abandoning the seeds of the vipāka-consciousness within the unimpeded path (ānantaryamārga). "The fundamental nature of the mind is eternally abiding and manifested before one" means realizing the inherently possessed dharmakāya within the path of liberation (vimuktimārga). "Thus (tathā)" is the nature of the tathatā of original awakening. "Come (āgata)" is the cultivation wherein initial awakening unites with the original. Initial and original are united as one, and therefore one is a Tathāgata; initial and original are both forgotten, and therefore it is named ultimate awakening.