There is a great deal more in this expression, "cultivate a hunger," than at first sight appears. People who satisfy their lower appetites know nothing of the true hunger of the soul. And consequently when they see the food designed by the Almighty Love and Wisdom to satisfy to the full all the demands of true hunger, these grossly contented minds pass them by, their eyes are closed so that they see not; their senses are dulled so that they smell not, hear not, feel not, taste not. I have seen people fast from every kind of food, solid or liquid, for ten, twenty, thirty or forty, and in one case even for eighty days. At the end of these fasts, the fasters related with delight their keen pleasure and satisfaction at realizing what real hunger was as differentiated from the mere appetite for food that they had felt prior to their fasts. As a rule we eat too much. We satiate ourselves upon foods that are not always good for us, and thus destroy the true normal appetite for pure, good, healthful, simple foods. Among these people who fasted were several who were thin and poorly nourished, and yet who had abnormal appetites and ate far more food than those who were robust, hearty, vigorous, and strong. The physician said, what was self-evident, that the more food they ate, the less nourished they became, because they overloaded themselves with food and much of it was the wrong kind. It was hard work for these people to fast, but at the close of the fast, their abnormal and unnatural appetite had disappeared and in its stead had come a true, normal hunger which revealed to them the right kind of food that they should eat to satisfy the demands of the body and which, when they did eat, was immediately assimilated. The result was that within a month or two, after having learned what real hunger was as differentiated from perverted appetite, they were fat and rosy, plump and vigorous, beautiful and energetic. It is exactly the same in our mental and spiritual life. We feed upon the grosser foods to satiation and repletion and the result is that we suffer from mental and spiritual dyspepsia and are pale, thin, anæmic and weak, where we should be beautiful, vigorous, energetic, and strong. Quit stuffing and craving the lower foods. Stay away from the theater, the vaudeville, the cheap show. Quit reading the sensational novel, the trashy story of excitement. Give your brain, your mind, your soul, a rest. Fast a while. Do as Elijah did, as Jesus, as Mahomet. Go into the desert, the solitude, and for forty days and nights rest, body, mind, and soul, until real hunger takes possession of you. Then come forth and begin to absorb from all the great wealth of God that surrounds you. There are three chief sources of purest mind and soul supply and I wish briefly to consider each one of these. They are: 1. Observation. 2. Reading. 3. Intuition.