Guarantees of perpetuity.
These words are a promise to the Jews, and plainly refer to the national existence of Israel; but the breadth and spirituality of file covenant they confirm warrants us in seeing in them the pledges of God's faithfulness and the Church's stability for all who enjoy the privileges of the covenant. These pledges are to be seen in the symbolism of nature. The God of grace is thee God of nature. Spiritual revelation throws light on the vague religion of nature; but nature sends back confirmations for the truths of the higher revelation. Two are named here.
I. THE UNIFORMITY OF LAW. This great doctrine has come to the forefront of modern science. By some it is thought to be a difficulty in the way of religious belief. But Jeremiah shows us how to regard it as an encouragement for faith. It proves to us the unchangeableness of God. Events shift and vary, but laws remain. The seasons come and go, but the sun still shines and rules them. Though the sea rages and roars, its wild waves are curbed by invisible reins, linked to heavenly motions, obedient to unvarying laws. So we may learn that amid the changing circumstances of life and the varying actions of God in providence the same great principles are maintained and the promises of God work out their blessed results unceasingly. This is true of God's thoughts and will. It is true of our personal enjoyment of the privileges of his covenant. Israel is to endure. The Church is founded on a rock. The "final perseverance" of the Christian follows from his identification of his life with eternal laws of God. God will no more cast off his people than the sun cease to rule the seasons or the moon the tides; for in grace, as in nature, eternal laws and principles preserve eternal stability to the spiritual universe.
II. THE IMMEASURABLE GREATNESS OF THE UNIVERSE As a mere figure of speech, verse 37 is highly expressive. By appealing to an impossible feat God pledges his word the more clearly and the more forcibly. But we have here also an analogy based upon common principles of the material and spiritual worlds.
1. The Creator of heaven and earth is too great to be changeable. Change is a sign of weakness. Strength secures stability.
2. Our action is a small thing in the sight of God. It cannot shake the foundations of the universe, cannot even touch them. To us it appears to revolutionize all things; but God sees it in its true light and treats it with calm pity. It is not in the power of such beings as we are to overturn the counsels of God.
3. As nature is wrapped in mystery, so is the spiritual kingdom of God. There are in both hidden forces the action of which we cannot predict. Therefore it is rash and foolish for us to judge God's actions by our limited knowledge. He may appear to east his people off. We may no longer see him. His actions may seem harsh and cruel. But we are not competent to judge. Out of the mystery of Nature and her dark depths of being, out of midnight and winter, there issue life and light; out of God's darkest dispensations of providence his eternal counsels of love proceed to their unerring beneficent results.