華嚴法界玄鏡 1.38

1.38

觀曰：四、空即是色。何以故？凡是真空必不異色，以是法無我理非斷滅故，是故空即是色。如空色既爾，一切法皆然，思之。

The Contemplation states: "4. Emptiness is form itself. Why is this? Any true emptiness must not be different from form, because it is the principle of the selflessness of dharmas and not annihilation; therefore emptiness is form itself. Since it is so for emptiness and form, all dharmas are likewise; reflect upon this."