These persons (spiritual gluttons) have the same defect in regards to the practice of prayer. They think that prayer consists in experiencing sensible pleasure and devotion. They strive to obtain this by great effort, wearying and fatiguing their faculties and their heads; and when they have not found this pleasure they become greatly discouraged, thinking that they have accomplished nothing. Through these efforts, they lose true devotion and spirituality, which consist in perseverance, together with patience and humility and mistrust of themselves, that they may please God alone. For this reason, when they have once failed to find pleasure in this or some other exercise, they have great disinclination and repugnance to return to it, and at times they abandon it. They are, in fact, as we have said, like children, who are not influenced by reason, and who act, not from rational motives, but from inclination. Such persons expend all their effort in seeking spiritual pleasure and consolation; they never tire, therefore, of reading books; and they begin, now one meditation, now another, in their pursuit of this pleasure which they desire to experience in the things of God. But God, very justly, wisely and lovingly, denies it to them, for otherwise this spiritual gluttony and inordinate appetite would breed innumerable evils. It is, therefore, very fitting that they should enter into the dark night, whereof we shall speak, that they may be purged from this childishness. –Saint John of the Cross ‘Dark Night of the Soul’

St John of the Cross Adoring