John Calvin's Bible Commentary
Jeremiah 17:23
Here the Prophet exaggerates their crime, — that the Jews had not now begun for the first time to violate this precept of the Law; for he reminds them that the Sabbath had been before violated by their fathers. We have said elsewhere that men are less excusable when the children follow the bad examples of their fathers. This is indeed what the world does not commonly think; for we see at this day, that most men boast of the examples of their fathers, when they wish to reject both the Law and the Prophets and the gospel: they think themselves to be defended by a strong shield, when they can object to us and say that the fathers had done otherwise. But we have seen from many passages how frivolous is such a defense; and Jeremiah here confirms the same thing, by saying that the crime of the people was the more atrocious, because their fathers had many ages before begun to despise this command of God.
But they heard not, (188) he says, nor inclined their ear, but hardened their neck. By these words he shews most clearly that their fathers had not sinned through inadvertence or ignorance, but because they had hardened themselves in the contempt of God. It often happens that men, rightly taught, go astray through ignorance, as their want of knowledge may prevent them to understand what they hear: but when men incline not their ear, but harden their neck, their obstinacy becomes manifest, for they knowingly and wilfully reject God. Such perverseness then does Jeremiah here set forth by the various expressions he employs, as we have seen done in other places.
As to the hardening of the neck, it is a metaphor, as stated elsewhere, taken from untameable oxen. God compares his law to a yoke, and for the best reason; for as the oxen are tamed that they may labor and are trained to obey when the yoke is laid on them; so also God proves our obedience, when he rules us by his law, for we otherwise wander after our lusts. As therefore God corrects and checks in us by his law, all the unruly passions of the flesh, he is said to lay his yoke on us. Now, if we are intractable and do not submit to the authority of God, we are said to harden our neck. Jeremiah speaks afterwards without a metaphor, and says, That they heard not, nor received instruction, or correction. (189) The word מוסר musar, means teaching or correction. The import of the whole is, that the Jews were not only unteachable when the will of God was plainly made known to them, but that they were also refractory and perverse in their spirit: for when to teaching were added exhortations the more to stimulate them, and when to these were added threatenings, yet God could not by any means subdue their wantonness. It now follows--
And they hearkened not, nor inclined their ear; But hardened their neck, So as not to hear, and not to receive correction.
They were reproved and warned; but they refused to be corrected. — Ed.