Standing at the edge of a cliff, you seek the view from the other side of the chasm. How is it that you can see from there? Only by going to that side.
Letting go of the tree you hold for safety is not enough. To let go of the rope with one hand, but grasp even so slightly the thread of security, you can not get to the other side. There is only one true security, and it is found in letting go of all and placing oneself in the arms of All - God, by any name, divine, - and further beyond all names. It is this that supports one in the step into the void; which carries you to the other side. There you perceive the view.
It is like the heart. Grabbing on is the love of self. Holding tight to the thread of thought, of separate being, self so small, there can not be the perception through the eyes of Self Divine. Unity is not duality. One is not two. Holding on to thought of self, clinging to the "safety" of illusion, one can not see through the eye of God. The knowledge of God, of That Which IS, is seen and known through those eyes. Clinging is clinging. Letting go is emptying of oneself in heart. Relying on the True Heart, faith carries you on its wings to the other side.