Form Is Emptiness
The Teaching
Form is emptiness, emptiness is form. Emptiness is not other than form; form is not other than emptiness. Whatever is form, that is emptiness; whatever is emptiness, that is form.
Therefore, Shariputra, all phenomena are emptiness. They have no characteristics. They are unborn and unceasing. They are not defiled and not without defilement. They do not decrease and do not increase.
Therefore, in emptiness there is no form, no feelings, no perceptions, no mental formations, no consciousness.
Gate gate pāragate pārasaṃgate bodhi svāhā — Gone, gone, gone beyond, gone completely beyond — Awakening!
Commentary
The Heart Sutra's core teaching: Sunyata, emptiness, does not mean nothingness but that all phenomena lack fixed, independent existence. Everything is empty of a permanent, isolated self.
This maps directly onto the Taoist teaching that all things arise from and return to the undifferentiated ground. It echoes the Kabbalistic Ein Sof, infinite fullness that contains no fixed forms. Plotinus' One beyond all being is identical: the ground that contains all things by being none of them specifically.
For the perennial synthesis: sunyata is not nihilism. It is the recognition that the apparent solidity of the separate self is a construction, and that what lies beneath is not nothing but the ground of being itself. The same ground Eckhart called the Seelengrund.