Form is not different from emptiness, and emptiness is not different from form. Form itself is emptiness, and emptiness itself is form. Sensation, conception, synthesis, and discrimination are also such as this. All dharmas are empty — they are neither created nor destroyed, neither defiled nor pure, and they neither increase nor diminish. This is because in emptiness there is no form, sensation, conception, synthesis, or discrimination. There are no eyes, ears, nose, tongue, body, or thoughts. There are no forms, sounds, scents, tastes, sensations, or dharmas. There is no field of vision and there is no realm of thoughts. There is no ignorance nor elimination of ignorance, even up to and including no old age and death, nor elimination of old age and death. There is no suffering, its accumulation, its elimination, or a path.
(Heart Sutra)