大乘起信論義記別記 1.13

1.13

Question: How do the purity of wisdom and initial enlightenment differ? Answer: In fact, they are not different, because initial enlightenment is simply original enlightenment functioning in accordance with defilement. Now, because their counterparts are different, they are said to have differences. As for the “differing characteristics”: original enlightenment, in terms of defilement, forms the purity of wisdom; remedying defilement and returning to the source, as the counterpart to the source, is called initial enlightenment. Furthermore, since original enlightenment forms the initial and there is no other dharma, in accordance with this meaning it is collectively termed originally possessed. Leaving aside the aspect of tathatā, this is speaking of the origin solely within the pratītyasamutpāda of arising and ceasing. Furthermore, because it is only when initial enlightenment accords with the origin that it is named original enlightenment, and apart from initial enlightenment nothing is accomplished, in accordance with this meaning it is collectively termed produced through practice. Furthermore, because the origin acts as initial enlightenment, the origin is described as originally possessed through production by practice. These identical meanings constitute a single pratītyasamutpāda, like a round jewel: whichever single gate is raised, there is none that is not completely subsumed.