華嚴經義海百門 1.42

1.42

八、施佛事者，謂塵音聲文字，皆悉性離，即解脫故。此無性文字，非事之事，以空無故，佛智所顯。隨所施為，不失法界，即為佛事。經云「有所施為，無非佛事。」

Eighth, performing Buddha-works: this means that the dust mote's sounds, voices, and letters are all completely divorced from intrinsic nature, which is liberation. These letters without intrinsic nature are phenomena that are non-phenomena, because they are empty and non-existent, manifested by the Buddha's wisdom. Whatever is performed does not depart from the dharmadhātu, which is precisely Buddha-works. The sūtra says: "Whatever is performed is nothing other than Buddha-works."