Concerning this Old Testament pericope...
Concerning this Old Testament pericope (Jeremiah 3:21--4:2) the central thrust is: "God's people would enjoy security if only they would return to God and make their repentance real (Professor Kuist)." What is repentance? It means to turn back to God. One's God is what he or she considers to be the ultimate good. For some it is mammon; for others success or reputation. But in either case basically it is self. Luther said: "All evil is only a symptom; the real disease lies in the fact that we have another god called 'I'." But this god can never convert us or turn us back to the true God.