觀音玄義 2.37

2.37

第二釋體者，以靈智合法身為體。若餘經明三身者，則單以法身為體，此品但有二身義，故用理智合為體也。只此智即實相理。何以故？若無靈智，實相隱，名如來藏。今知權實，相與理不二，如左右之名爾。若明實相體義，廣出《大本玄義》。

Second, explaining the substance: taking spiritual wisdom united with the dharma-kāya as the substance. If other sūtras explain the three bodies, they take the dharma-kāya alone as the substance; this chapter only has the meaning of two bodies, so it uses the union of principle and wisdom as the substance. This wisdom is itself the principle of the true mark. Why? If there were no spiritual wisdom, the true mark would be concealed and named the tathāgatagarbha. Now knowing the expedient and real, mark and principle are non-dual, like names for left and right. The meaning of the substance of the true mark is set forth extensively in the *Profound Meaning of the Great Text*.