The Vijnana Bhairava Tantra

...nature of the connection. Since it is to be stated at the end: "Having said this, the delighted Goddess embraced the neck of Shiva," and since the purpose is the absorption into Vijnana Bhairava, this scripture itself is the naming of that [state]. The Supreme Lady, who occupies the peak of the descent of the Tantra, proposes the subject matter through a sequence of appropriate expressions.

O Lord, O Self, who is the essence of the play of illuminating the universe, the scripture whose origin is from the Yamala the union of Rudra and his Shakti, which is the essence of the equality of all Rudras, non-Rudras, and their powers—as the sacred tradition says:

"From the invisible, silent, supreme cause that is Shiva, the scripture that is in the form of sound emerged, which is extremely difficult to obtain."
The entire scripture of the Trika, where the division of the three principles—the essence of the three powers: Supreme, Middle, and Lower; the essence of Human, Energy, and Shiva—is differentiated by the prominence of knowledge, action, and so on, has been heard in its entirety. How is it "according to the distinction of the essence from the essence"?

Footnotes: Manuscript variants: "kridadi" for "krodanadi"; "arthat" is omitted in some copies.