Maybe the blackness is a wall you put up between your self and hyperspace. The ego does not want to die and so holds on very tight, usually as fear of an experience you cant handle. But then after a while, after you know yourself and your limits the fear goes away. And hyperspace, breaking it threw, comes as natural as breathing.
Let go of your fears, your apprehensions, and immerse yourself. Let the voyage take you where it wants you to go. Relax, turn off your mind and float downstream...............