註華嚴法界觀門 1.20

1.20

理法界也。原其實體但是本心，今以簡非虛妄念慮，故云真。簡非形礙色相，故云空也。

The dharmadhātu of principle. Tracing its actual substance, it is simply the original mind. Now, to select against false thoughts and deliberations, it is called "true"; to select against rūpa-characteristics with shape and obstruction, it is called "empty".