The chapter opens with an accusation: the sin of Judah is written with an iron pen and with a point of diamond, engraved on the tablet of their heart and on the horns of their altars. So the Lord will give their wealth as plunder, and they will loosen their hand from their heritage.
Verses 5-8 contrast two ways. Cursed is the man who trusts in man and makes flesh his strength, whose heart turns away from the Lord; he will be like a shrub in the desert and will not see good when it comes. Blessed is the man who trusts in the Lord, whose trust is the Lord; he will be like a tree planted by water, which sends out its roots by the stream, does not fear when heat comes, whose leaves stay green, and is not anxious in the year of drought nor does it cease to bear fruit.
The heart is deceitful above all things and desperately sick; who can understand it? I the Lord search the heart and test the mind, to give every man according to his ways. After some brief images, the prophet declares that the Lord is the hope of Israel and that those who forsake him will be put to shame. Jeremiah prays: heal me, Lord, and I shall be healed. Some ask where the word of the Lord is and tell it to come. He did not run away from being a shepherd after the Lord, and he asks that his persecutors be put to shame, not himself.
Verses 19-27 take Jeremiah to the Benjamin Gate and the other gates of Jerusalem to tell the people to keep the Sabbath day and carry no burden on it. The Lord recalls that he commanded this of their fathers, but they did not obey. If they keep it, kings and princes will enter the gates and the city will be inhabited forever. If not, the Lord will kindle a fire in its gates that will devour the palaces of Jerusalem.