So lofty is the goal to be reached but so low is his present position, that it would be unnatural for him not to feel at times shaken by despair or oppressed by futility. Such moods, when humanity's life seems pointless and his own purposeless, when labour becomes tedious and pleasure depressing, will come over him from time to time. These dry periods, when mystical life seems boring and unreal, dull and dreary, are to be expected. They are normal experiences in every aspirant's career and their remedy is in God's hands in His good time. He is being tantalized so as to make him prize the divine visitation all the more. Most of the seekers are tried in this way. Then it also shows how helpless he is. For the last word lies with divine Grace. Yet all this is no excuse for ceasing self-effort, and so he will have to go on with his meditations and prayers and studies. For it is their activity which induces the Grace to descend.
-- Notebooks Category 23: Advanced Contemplation > Chapter 3: The Dark Night of The Soul > # 13