大乘起信論裂網疏 4.59

4.59

"Dharmakāya bodhisattvas" refers to the first bhūmi of joy in the gradual teaching, and the first stage of resolve in the sudden teaching. The tathatā they have realized is the own-essence of all Tathāgatas, for there are not two essences. Having already partially realized its essence, they must also partially share its function; therefore the Avataṃsakasūtra states: 'At the moment of first generating the mind, one immediately achieves perfect enlightenment; the pure and wondrous dharmakāya serenely responds to all.' Everything after this is the path of effortless action; hence it says 'cultivating spontaneously,' and so forth. The third part, explaining the perfuming of pure dharmas, is finished.