Vijnana Bhairava Tantra
61: At the moment when one has perception or knowledge of two objects or ideas, one should simultaneously banish both perceptions or ideas and apprehending the gap or interval between the two, should mentally stick to it. In that gap will Reality flash forth suddenly.
62: When the mind is restrained to one object of awareness, casting all others aside and not allowing movement to take place from one to another, then inside that perception the awareness blossoms.
63: One should concentrate with an unwavering mind on all existence, the body and even the universe simultaneously as nothing but consciousness, then the supreme consciousness arises.
64: By the fusion of the two breaths - prana (expiration) and apana (inspiration), there arises finally a condition in which there is complete cessation of both. By meditating over that condition of void in which there is no feeling of either prana or apana, the yogi becomes so competent that there arises in him the intuitive experience of Equality (samatva-vijnana-samudgamana)
65: The yogi should contemplate the entire universe or his own body simultaneously in its totality as filled with his bliss. Then through his own ambrosia-like bliss, he will become identified with the supreme bliss.