The surfaces of the world are aesthetically uneven. You come around a bend in the road and the world suddenly falls open. When we come upon beautiful things... they act like small tears in the surface of the world that pull us through to some vaster space.
There is no progress in prayer without progress in faith, a purification of faith. And this entails the removal of all the props which depend on human endeavor, human reasoning, signs and the rest. It is the naked faith which is a terrifying experience and yet is the meeting point ultimately between God and ourselves in the depth of our being. This experience of the purification of faith is not normally one which comes early in the spiritual life. We must learn to wait.