If we think about the desire for understanding, we notice how everyone wishes to learn, to read, to study, to learn about things in every possible way. But the desire cannot be satisfied until the light within is disclosed by which he may understand. We come then to the truth that all things can be accomplished by mastery of mind. And so the question arises, "How can the mind be mastered?" The answer is that the mind cannot be mastered until a man is master of the body. The difference between a master mind and a person without mastery is the difference between a man sitting on a saddle horse, holding the reins in his hand, and a man trying to ride bareback while the horse is bucking and going wherever it likes, and there is the fear that it will throw him at any moment; he is not able to control it.