This seed should be sown often, for many are the foes of the wheat, and if you repeat not your sowing you may never see a harvest. The seed must be sown everywhere, too, for there are no choice corners of the world that you can afford to let alone, in the hope that they will be self-productive. You may not leave the rich and intelligent under the notion that surely the gospel will be found among them, for it is not so: the pride of life leads them away from God. You may not leave the poor and illiterate, and say, "Surely they will of themselves feel their need of Christ." Not so: they will sink from degradation to degradation unless you uplift them with the gospel. No tribe of man, no peculiar constitution of the human mind, may be neglected by us; but everywhere we must preach the word, in season and out of season. I have heard that Captain Cook, the celebrated circumnavigator, in whatever part of the earth he landed, took with him a little packet of English seeds, and scattered them in suitable places. He would leave the boat and wander up from the shore. He said nothing, but quietly scattered the seeds wherever he went, so that he belted the world with the flowers and herbs of his native land. Imitate him wherever you go; sow spiritual seed in every place that your foot shall tread upon. Let us now think of what you cannot do. _You cannot, after the seed has left your hand, cause it to put forth life._ I am sure you cannot make it grow, for you do not know how it grows. The text saith, "And the seed should spring and grow up, he knoweth not how." That which is beyond the range of our knowledge is certainly beyond the reach of our power. Can you make a seed germinate? You may place it under circumstances of damp and heat which will cause it to swell and break forth with a shoot, but the germination itself is beyond you. How is it done? We know not. After the germ has been put forth, can you make it further grow, and develop its life into leaf and stem? No; that, too, is out of your power. And when the green, grassy blade has been succeeded by the ear, can you ripen it? It will be ripened; but can _you_ do it? You know you cannot; you can have no finger in the actual process, though you may promote the conditions under which it is carried on. Life is a mystery; growth is a mystery; ripening is a mystery: and these three mysteries are as fountains sealed against all intrusion. How comes it that there is within the ripe seed the preparations for another sowing and another growth? What is this vital principle, this secret reproducing energy? Knowest thou anything about this? The philosopher may talk about chemical combinations, and he may proceed to quote analogies from this and that; but still the growth of the seed remains a secret; it springs up, he knoweth not how. Certainly this is true of the rise and progress of the life of God in the heart. It enters the soul, and roots itself we know not how.