It happens only in blink. Sages who have closed there eyes most in there lifetime know when to blink. How much to blink, because blinking has a count. And whosoever blinks is certain, dies. That is how gods are differentiated from humans. because humans blink and gods do not.
We live through a series of decisions we make throughout our lives, but those decisions that no-one gets to know about, they are our subconscious players that have been leading us, our destinies quietly. Like there is only a representative to a vast work that any government does, taking a country forward. Similarly our body being that country is governed by that subconscious mind, and many organs that can’t br seen from outside but are playing a part subtly. One may only reach that awareness of understanding these workings once he sits quietly for a prolonged time, focusing towards the light in the dark, and to particularly nothing yet everything.
So keep making sure that you sit and sit only, with a stomach that is empty. Reaching out to foundational breath. To focus on its going and coming. But while doing so have this in mind; as you breathe in, and breathe out that you are not this body. That you are not the mind.