維摩經略疏垂裕記 7.170

7.170

問：虛空為座，何身所坐？答：以如虛空身坐如虛空座。身座相稱能所交融，即寂光法身依正不二也。秖由理具至果方爾，故使初心亦坐空座。故《法華》云「如來座者，諸法空是。」此即觀行空座也。今明界成，即究竟空座也。應約六即以辨座異。

Question: With space as the seat, what body sits on it? Answer: With a body like space one sits on a seat like space. The body and seat correspond to each other, and the active and the passive blend together; this is the dharmakāya of quiescent illumination, wherein circumstantial and direct [rewards] are non-dual. Merely because [the cause] inherently contains the principle, only upon reaching the fruit is it so; hence, one at the initial mind also sits upon the empty seat. Therefore the Lotus Sūtra says: "The seat of the Tathāgata is the emptiness of all dharmas." This is the empty seat of contemplation practice. Here, clarifying the completion of the realm, it is the ultimate empty seat. One should distinguish the differences in seats in terms of the six identities.