This coal is simply a portion of a tree which grew many, many hundreds or thousands of years ago, and which, in some great convulsion of nature, was buried deep under the surface of the earth in what we now call coal mines. The coal has undergone some chemical changes, but, nevertheless, all the light there is in the coal is simply that buried sunshine, which was stored up centuries and centuries ago, in the form of vegetables and trees. Now, when it burns in the grate or in the furnace it simply releases that heat and warmth and light, which was stored up in these trees many, many centuries ago. It is simply buried sunshine which God has stored up for our use. The same is true of the light of the candle; if it were not for the light of the sun there would be no light giving power in any oil or tallow, or in this carbon, which is used in the electric light; they all derive their light from the sun itself. Just so it is with all the truth and righteousness there is in the world. When you see a man who is good and Christlike, it is not because that man has the power in himself to be good, but it is because he has received that power from the Lord Jesus Christ. The light of the Sun of Righteousness has shone into that man's heart, and the light that goes out through his daily conduct and character, is only the light of the Son of God shining out through that man. All objects which live in the sunlight drink in this light-giving power, and all people who live daily in the light of the Sun of Righteousness will partake of His nature and of His character, and then live that nature and character in their own daily lives. In this way they do as Jesus commanded, let their lights so shine, that others seeing their good work, glorify their Father which is in heaven. You should be careful to note that Jesus does not say that we ourselves are to shine so that others may glorify us. No, not at all. Many people try to shine or to attract the attention of others to themselves, but that is not what Jesus said or meant, but rather the reverse. Neither are we to attempt to shine, or to attempt to attract the glory or honor to ourselves. Let not yourself so shine, but let your _light_ so shine that others seeing your good works may glorify--not you, but your Father which is in heaven. We must let Jesus Christ shine in and through us. Whenever you see men or women, or girls or boys who are living beautiful Christian lives, it is not they that light up the moral darkness that is in the world, it is Jesus Christ who lives in them and shines through them, that makes them good and holy, and consequently a source of light and blessing to all about them.