Everyone desires success, but not every one succeeds. In any line there are certain things on which success depends. Success can be built only on a properly and carefully laid foundation. Those who desire to be Christians desire to be successful in the Christian life. Those who are called to work for God desire to be successful workers. Jesus said to Martha, “One thing is needful.” There is generally one basic principle on which all else must be built. If this is overlooked or neglected, partial or complete failure is certain. Many attempts are failures because of being begun at the wrong place. In mathematics we must master the rudiments before we can compute the orbits of the planets. In music we must learn tones and relations of tones before we can produce the exquisite harmonies of the master. In astronomy we must know something of our little home-planet before we can launch out into the heart-stirring immensities of space. Before we can rightly know God we must know ourselves. The animal instinctively knows that the gnawing pain in its stomach is a hunger for food, and immediately seeks to satisfy it. But the man who does not know himself, who does not stop to consider and analyze, feels an unrest, a yearning, a hungering within his soul, and knows not why or what it is. He tries worldly pleasures; but they only partially satisfy, and at last render the case more serious than before. He tries all the remedies that he can find for his soul-hunger, but performs no cure, simply because he has not properly diagnosed his case. It is only when he knows that the cause of his unrest is soul-hunger for God and the bread of life, that he begins to try to satisfy himself properly. Women, and many of them professors, try to satisfy this craving by decking themselves with gold and gems and fine array, with the plumage of birds and the skins of beasts. Men try to satisfy it in the pool-room, by plunging into the muddy waters of the political sea, or by accumulating money and by the follies of life. As food is the only thing that properly satisfies the hunger of the body, so God is the only thing that satisfies the hunger of the soul. When people come to know that this hunger is for God, they begin to search for him if haply they may find him. The trouble is that people look at Christianity in the abstract, as a something apart from themselves, whereas it is a vital part of every spiritually normal man or woman. The saying of the old philosopher, “Know thyself,” proves his wisdom. True wisdom comes only by first understanding ourselves so as to know our relation to other things.