The Vajra Prajna Paramita Sutra, p187-188“How can you say emptiness is existence and existence is emptiness? That is too confused,” you may say.
Is it the principle that is confused, or is it you, or I? When you are confused you think that emptiness is emptiness and existence is existence. When the confusion is cleared, you know that emptiness and existence are equal. Do not attach to either annihilationism or eternalism. The equality and non-duality of emptiness and existence is called the Middle Way. Here true emptiness does not obstruct wonderful existence and wonderful existence does not obstruct true emptiness. True emptiness is wonderful existence; wonderful existence is true emptiness. When there is existence, then emptiness manifests; when there is emptiness, then existence is apparent. There is no emptiness, and there is no existence. They are not two. The non-duality of emptiness and existence is the equality of emptiness and existence.