Now, if I remove these small tacks, and place the magnet among these small nails, you will see that several of the small nails cling to the magnet, and I can lift them up. There are not as many, however, as there were of the tacks clinging to it. In like manner, as boys and girls grow older, they find it more difficult to come to Christ. [Illustration: Magnet and Larger Nails.] Here are some larger nails. When I place the magnet among them, but very few are attracted to it. And when I attempt to lift the magnet, most all of these large nails tall off. Only one, sometimes two, hold on successfully. Here are some nails that are still larger. Now, when I attempt to lift one of them with this magnet, you see that I can only lift one end of the nail. That is due to the fact that while the magnet draws these nails, the earth also draws them. That is the reason why these smaller nails, when they fall from the magnet, fall to the earth; because the earth draws them. The earth draws with so much greater force and power upon these large nails than the magnet draws that I cannot raise them by the magnet. It is on this account that they continue to hold fast to the earth rather than to the magnet. [Illustration: Magnet and Large Nails.] This represents the people who have grown old; who have large cares and responsibilities; who have become worldly-minded; who are drawn away by the "deceitfulness of riches and the lust of other things," and who, although they feel a desire to do right, yet have a stronger desire to do that which is not well-pleasing in the sight of God. Now, here are some old crooked, rusty nails. Let us see what effect the presence of the magnet will have upon them. Just as we might have expected. These rusty nails do not seem to feel the power or the influence of the magnet's presence. If I place the magnet up against the nail, and attempt to lift it, it does not seem to be drawn at all. It simply lies still, unmoved. These old, crooked, rusty nails represent people who have grown very old and very wicked, and who have become greatly hardened in sin. Jesus Christ and His love seem to make no impression any longer upon them. They are joined to their idols. God's Spirit has taken His departure, and they are left alone. Let me warn you, both young and old, that if you feel the drawing of God's Spirit, you should yield to Him, so as not to become more corroded and rusted, and coated over by every sinful influence, so that at last the love of God shall fail to have any effect upon you.