It is therefore, not good for us to take too seriously the many untoward experiences we have with ourselves in meditation. It is here that our old vanity and our illicit claims upon God may creep in by a pious detour, as if it were our right to have nothing but elevating and fruitful experiences, and as if the discovery of our own inner poverty were quite below our dignity. With that attitude we shall make no progress. Impatience and self-reproach will only foster our complacency and entangle us ever more deeply in the net of self-centered introspection. But there is no more time for such morbidity in meditation than there is in the Christian life as a whole. We must center our attention on the Word alone and leave consequences to its action. For may it not be that God Himself sends us these hours of reproof and dryness that we may be brought again to expect everything from His Word? “Seek God, not happiness”—this is the fundamental rule of all meditation. If you seek God alone, you will gain happiness: that is the promise. 

Life Together - Dietrich Bonhoeffer