首楞嚴義疏注經 5.272

5.272

性覺真空即中道理。以空是如來藏，故滿足周遍，具一切法，光明遍照法界性故，如摩尼寶隨意出生，如大溟渤深廣含攝，平等性智達解照了，境智一如，名佛知見。雖證於空，不為空縛，故云解脫。

The true emptiness of the essential awareness is the principle of the Middle Way. Because emptiness is the tathāgatagarbha, it is fulfilled and all-pervading, possessing all dharmas; and because its brightness universally illuminates the nature of the dharmadhātu, it is like a mani jewel producing things according to one's wish, or like the great ocean deeply and broadly containing all. The wisdom of equality reaches, resolves, and illuminates, so that realm and wisdom are as one; this is called the Buddha's knowledge and vision. Although he realizes emptiness, he is not bound by emptiness, hence it says 'liberating'.