they all ran outside, climbed to the roof, and there, covered with snow, quite stiff and almost dead, they found poor Hillel. They carried him indoors, warmed his cold limbs, and worked hard to restore him to life. He was at last resuscitated, and from this time on was allowed to attend the school without paying. Later he became a great teacher. He lived in Palestine at about the time of Jesus. He was admired for his learning, but even more for his good deeds and his unfailing kindness to every one. The question is now raised, Why did Cleanthes work at night instead of seeking rest, and why did Hillel remain outside in the bitter cold and snow? The pupils will readily answer, Because they loved knowledge. But why is knowledge so desirable? With this interrogatory we are fairly launched on the discussion of our subject. The points to be developed are these: First, knowledge is indispensable as a means of making one's way in the world. Show the helplessness of the ignorant. Compare the skilled laborer with the unskilled. Give instances of merchants, statesmen, etc., whose success was due to steady application and superior knowledge. Knowledge is power (namely, in the struggle for existence). Secondly, knowledge is honor. An ignorant person is despised. Knowledge wins us the esteem of our fellow-men. Thirdly, knowledge is joy in a twofold sense. As the perception of light to the eye of the body, so is the perception of truth to the eye of the mind. The mind experiences an intrinsic pleasure in seeing things in their true relations. Furthermore, mental growth is accompanied by the joy of successful effort. This can be explained even to a boy or girl of thirteen. Have you ever tried hard to solve a problem in algebra? Perhaps you have spent several hours over it. It has baffled you. At last, after repeated trials, you see your way clear, the solution is within your grasp. What a sense of satisfaction you experience then. It is the feeling of successful mental effort that gives you this satisfaction. You rejoice in having triumphed over difficulties, and the greater the difficulty, the more baffling and complex the problems, the greater is the satisfaction in solving them. Fourthly, knowledge enables us to do good to others. Speak of the use which physicians make of their scientific training to alleviate suffering and save life. Refer to the manifold applications of science which have changed the face of modern society, and have contributed so largely to the moral progress of the world. Point out that all true philanthropy, every great social reform, implies a superior grasp of the problems to be solved, as well as devotion to the cause of humanity. In accordance with the line of argument just sketched the rule for the pursuit of knowledge may be successively expanded as follows: Seek knowledge that you may succeed in the struggle for existence. Seek knowledge that you may gain the esteem of your fellow-men.