18:1-10 While Jeremiah looks upon the potter's work, God darts into his mind two great truths. God has authority, and power, to form and fashion kingdoms and nations as he pleases. He may dispose of us as he thinks fit; and it would be as absurd for us to dispute this, as for the clay to quarrel with the potter. But he always goes by fixed rules of justice and goodness. When God is coming against us in judgments, we may be sure it is for our sins; but sincere conversion from the evil of sin will prevent the evil of punishment, as to persons, and to families, and nations.

8. their evil—in antithesis to, "the evil that I thought to do."

repent—God herein adapts Himself to human conceptions. The change is not in God, but in the circumstances which regulate God's dealings: just as we say the land recedes from us when we sail forth, whereas it is we who recede from the land (Eze 18:21; 33:11). God's unchangeable principle is to do the best that can be done under all circumstances; if then He did not take into account the moral change in His people (their prayers, &c.), He would not be acting according to His own unchanging principle (Jer 18:9, 10). This is applied practically to the Jews' case (Jer 18:11; see Jer 26:3; Jon 3:10).