Jeremiah 18:6

But we must bear in mind what I have already stated — that vain was the confidence by which the Jews deluded themselves; for they thought that God was bound to them, and so they promised themselves a state of perpetuity, and, as though they could with impunity despise the whole law, they ever boasted that the covenant, by which God had adopted the seed of Abraham, was hereditary. Now the Prophet shews that the covenant was in such a way hereditary, that yet the Jews ought to have regarded it as it were an adventitious benefit, as though he had said, “What God gave you he can take away at any time; there is then nothing certain to you, except so far as God will be propitious to you.” In short, he reminds them that the whole of their safety depended on God’s gratuitous layout, as though he had said, “Ye have nothing as your own, but what God has conferred on you is at his will and pleasure; he can to-day take away even what he had yesterday given you. What meaneth then this foolish boasting, when ye say that ye are exempted from the common lot of men?”

The Jews might indeed have rightly disregarded all the dangers of the world, for God had gathered them under his own protection; they would indeed have been safe under his guardianship, had they observed mutual faithfulness, so as to be really his people as he had promised to be their God; but as they esteemed as nothing his whole law, and made void the covenant in which they foolishly gloried, the Prophet, as we see, did not without reason shake off that confidence by which they deceived themselves.

We may hence gather a useful doctrine: With regard to the whole race of man there is nothing certain or permanent in this life; for God can change our condition at any time, so as to cast down the rich and the eminent from their elevation, and also to raise up the most despised of men, according to what is said in Psalm 113:7. And we know this to be true, not only as to individuals, but also as to nations and kingdoms. Many kings have so increased their power as to think themselves beyond the reach of harm; and yet we have seen that God laid them prostrate as by a sudden whirlwind: so also it has happened to powerful nations. With regard then to the condition of mankind, God shews here as in a mirror, or by a vivid spectacle, that sudden changes are often in the world: which ought to awaken us from our torpor, so that no one of us may dare to promise himself another day, or even another hour, or another moment. This is one thing; but this doctrine has a peculiar application to us; for as God has by a peculiar favor separated us from the rest of the world, so he would have us to depend wholly on his mere good will. Faith indeed ought to be tranquil, nay, it ought to disregard whatever may bring on us any terror or anxiety; but faith, where has it its seat? In heaven. Then courage is required in all the children of God, so that they may with a quiet mind disregard all the changes of the world. But we must see that the tranquillity of faith be well founded, that is, in humility. For as we cast our anchor in heaven, so also, with regard to ourselves, we ought always to he low and be humble. Whosoever then flies in vain confidence boasts in vain of faith, and falsely pretends that he trusts in God. Let it then ever come to our minds, and constantly recur to us, that our condition is not through ourselves safe and secure, but through the gratuitous goodness of God. We now see the application of this doctrine. The Prophet proceeds, —