41 If you will return, Israel, says Yahweh, if you will return to me, and if you will put away your abominations out of my sight; then you shall not be removed; 2 and you shall swear, As Yahweh lives, in truth, in justice, and in righteousness; and the nations shall bless themselves in him, and in him shall they glory.

3 For thus says Yahweh to the men of Judah and to Jerusalem, Break up your fallow ground, and don’t sow among thorns. 4 Circumcise yourselves to Yahweh, and take away the foreskins of your heart, you men of Judah and inhabitants of Jerusalem; lest my wrath go forth like fire, and burn so that none can quench it, because of the evil of your doings.

Matthew Henry's Commentary on Jeremiah 4:1-4

Commentary on Jeremiah 4:1-2

(Read Jeremiah 4:1-2)

The first two verses should be read with the last chapter. Sin must be put away out of the heart, else it is not put away out of God's sight, for the heart is open before him.

Commentary on Jeremiah 4:3-4

(Read Jeremiah 4:3-4)

An unhumbled heart is like ground untilled. It is ground which may be improved; it is our ground let out to us; but it is fallow; it is over-grown with thorns and weeds, the natural product of the corrupt heart. Let us entreat the Lord to create in us a clean heart, and to renew a right spirit within us; for except a man be born again, he cannot enter into the kingdom of heaven.