大方廣佛華嚴經隨疏演義鈔 1.19

1.19

The Commentary states: "Merging with empty space as the essential nature": third, there is one clause, clarifying the profundity of the essence. There are two meanings: first, in terms of the World-Honoured One's body inherently possessing the ten bodies, this is precisely the dharmakāya. Because the dharmatā body is the dharmakāya, the sūtra below states: "Nature-emptiness is precisely the Buddha, beyond reckoning." It also says: "The Buddha takes the Dharma as body, pure as empty space." Second, in terms of external empty space, by fusing the three worlds into the Buddha's body, external empty space is the space body; hence it says "merging with empty space as the essence," because its nature is fused and unimpeded.