Vijnana Bhairava Tantra – 89

Train them inward

Yasya Kasyendriyasyaapi Vyaghathaccha Nirodhitha:|

Pravishtasyadvaye ShunyeTatraivatma Prakashate||

If the individual takes upp even one sense organ and restrains it from going repeatedly to its pastures, he enters into his own non-dual void within. The expression of the mind outward is brought within and there the atman shines in all its glory.

For instance, instead of allowing the eyes to roam around and getting tired watching different forms all the time, they can be kept closed. This allows the eye of contemplation to open within and there lies the discovery of the self. – SS

Vignana Bhairava Tantra – 88

Bhairava expands with consciousness

Evameva Nimeelyadau Nethre Krishnabhamagrataha|

Prasarya Bhairavam Rupam Bhavayanstanmayobhaveth||

In the same way, as soon as you close both the eyes, there is a deep darkness that is seen before you, within closed eyes. Allow the consciousness within, that beholds the darkness, to expand into the form of Bhairava. As you meditate upon that form in this manner, you soon become one with the consciousness of Bhairava. - SS

Vignana Bhairava Tantra - 87

Meditate on the dense darkness of night

Evameva Durnishayam Krishna Pakshaagame Chiram|Taimiram Bhavayan Rupam Bhairavam Rupameshyati||

This verse tells us to do dharana or concentrate the mind on the darkness of the night's sky. It is not the darkness of a bright moonlit sky, but the dense and fearsome darkness when the moon approaches a new moon day of the waning phase. Sit alone with the sky for company and look at the terrible darkness of the sky. Meditate upon this thick black dark form of formlessness and Bhairava the aspect of truth assumes thhat very dark form right before your eyes. - SS