Prayer never touches us as long as it remains on the surface of our lives, as long as it is nothing but one more of a thousand things that must be done. It is only when prayer becomes "the one thing necessary" that real prayer begins. Prayer begins to take on its full dimensions only when we begin to intuit that the subtle nothingness of prayer is everything.
The dark night of the soul refers to an extended period of acute purification that a spiritual practitioner undergoes immediately before making the final transition to deep spiritual awakening. It emphasizes purification and the act of letting go of what no longer serves after many lesser trials have been navigated.