The practice of meditation brings all kinds of experiences of uncertainty, discontentment of all kinds. But those experiences seem to be absolutely necessary. In fact, they seem to be the sign that you are on the path at last. So we can't do publicity by having testimonials for meditation practice. If we did, it would be disastrous. This has been pointed out many times in the books and the teachings. It has been said over and over that this journey is not particularly pleasant; you have to shed your ego.
From "Loneliness," in The Path Is the Goal: A Basic Handbook of Buddhist Meditation, page 135.