大方廣佛華嚴經疏 50.31

50.31

第九「佛子如來身者」下體離二邊。身若是實，有不可滅；身若是虛，何能起滅？若有方所，此現彼無；由非實故，起滅無恒。由非虛故能無不現，無方所故感處即形。本願力故化周法界，隨堪度故見則不同。

Ninth, from "Bodhisattvas, as for the Tathāgata's body..." onward, essence is free from the two extremes. If the body were substantial, being existent, it could not be extinguished; if the body were empty, how could it arise and cease? If it had a location, appearing here it would be absent there; because it is not substantial, arising and cessation are not fixed. Because it is not empty, it can leave nothing unmanifest; because it has no location, it takes form wherever there is resonance. By the power of original vows, conversion pervades the dharmadhātu; according to receptivity to deliverance, what is seen is different.