Vijnana Bhairava Tantra
- 36: By using the hands as tools to block the entrances in all directions, the eyebrow centre is pierced and bindu or light is seen. Being gradually absorbed within that, the supreme state is realized.
- 37: Whenever one meditates upon the subtle fire, in the form of a tilak like the mark on the forehead, or on the bindu at the end of the shikha, a condition of agitation and shaking is produced, followed by absorption and dissolution in the cave of the heart.
- 38: One who is adept in listening to the unstruck sound in anahata, which is uninterrupted like a rushing river, attains the supreme state of Brahma by mastery of shabdabrahman, the form of Brahman as sound.
- 39: O Bhairavi, one who repeats the Pranava (Aum) perfectly, while concentrating on the void for protracted periods, experiences the void, and by that void the transcendental shakti is revealed.
- 40: Whoever contemplates even on the matras or letters (of Aum) from first to last, in the form of void, verily that sadhaka by meditation on the void becomes the void.