"Whatever is the dharmatā form is the primordial awareness of emptiness. Whatever is the primordial awareness of emptiness, appears as the dharmatā form.

Even if you understand merely that these two have a common locus, in order to refute any doubt that thinks it possible for there to be empty primordial awareness that is not the ultimate form (don dam gyi gzugs), and that it is possible for there to be ultimate form that is not empty primordial awareness [there are the lines]: “Emptiness is no other than form.”

Here ‘empty’ [does] not [mean] completely empty, but primordial awareness empty of dualism. The ultimate form aggregate (don dam pa’i gzug phungs) is not the form aggregate. The ultimate aspect of the form aggregate within the [endowed with] all supreme aspects dharmadhātu is the dharmatā form aggregate or the ultimate form aggregate."

Tāranātha