They have all abandoned him. There is no one who speaks well and does penance for his sins. They follow their own wills like a horse ready for battle. They bend their tongue as a bow. They invent everything, and there is no truth in them.
(Verse 5) Therefore, why is this people in Jerusalem turned away with contentious turning away? They have grasped falsehood and did not want to return. As much as I have provoked them to repentance, they have turned away from me, not so much out of a desire to sin, but to overcome me. For they have strongly grasped falsehood, whether idols or every corrupt thing that is contrary to truth and justice, and they did not want to return. It is not said: they were not able; but they have eagerly followed unjust things.
Those then who perish, perish against his will. This he testifies against each one of them day by day: “Turn from your evil ways. Why will you die, O house of Israel?” And again: “How often would I have gathered your children together as a hen gathers her chickens under her wings, but you would not.” And: “Why has this people in Jerusalem turned away with a stubborn revolting? They have hardened their faces and refused to return.” The grace of the Christ then is at hand every day. For it “wills all to be saved and to come to the knowledge of the truth.” It calls all without any exception, saying, “Come to me, all you who labor and are heavy laden, and I will refresh you.”
Just as there is no illness that is incurable for our physician, so the heavenly medicine cannot be powerless in any wound or for any length of time. Therefore, the physician testifies that he is always able to restore health to the one converted. He says, “In returning and rest, you shall be saved.” Hence God, through Jeremiah, does not cease to reprove the hardheartedness of certain ones. Instead he says in this way: “When people fall, do they not get up again? If they go astray, do they not turn back? Why then has this people turned away in perpetual backsliding? They have held fast to deceit. They have refused to return.” God does not punish the sins in the sinner, if the neck of the sinner is not stiffened.
[AD 420] Jerome on Jeremiah 8:5