Vijnana Bhairava 89 Turning Energy Inward

 The practice of blocking outwardness to reveal inner Light :

yasya kasyendriyasyāpi vyāghātāc ca nirodhataḥ |

praviṣṭasyādvaye śūnye tatraivātmā prakāśate || 89 ||

"By stopping any of the sense powers

by contradicting (their natural outward flow),

when one enters the non dual Void,

there and then the Self shines."