John Calvin's Bible Commentary
Jeremiah 11:1
Here the Prophet teaches us, that the Jews, though they continued to profess God’s holy name, were yet wholly perfidious, and had departed altogether from the law. The import of this discourse is, that the Jews gloried in the name of God, and yet were violaters of his covenant, for they had broken their faith pledged to God, and wholly cast aside the doctrine of the law. The Jews, no doubt, were often greatly exasperated against Jeremiah, as though he was pleading his own cause: it was therefore necessary to set before them their departure from the law, so that they might feel assured that their contention was not with Jeremiah but with Moses, and with God himself, the author of the law. They were doubtless exasperated with his doctrine; but Jeremiah could not spare them when he saw that they were so perverse.
We may understand this better by an example: Though the Papists at this day openly repudiate everything adduced from the law, and the prophets, and the gospel, yet they dissemble on this point, and even affirm that they receive whatever proceeds from God. As they then shuffle and do so shamelessly, he who seeks to restore the pure worship of God and true religion, may deal with them in the same manner. As for instance, when any one of God’s servants meets the Papists, he may thus address them: — “Let not the dispute be now between us individually, but hear what God commanded formerly by Moses, and what he has more fully confirmed by his prophets, and at last by his only — begotten Son and his apostles; so that it is not right to do anything any longer against his word: now then attend to the law and the prophets.”
We now understand what was God’s design in bidding his servant Jeremiah to speak these words. For, except we duly consider the unfaithfulness of that people, we shall feel surprised that the word covenant is so often mentioned, and it will appear unmeaning to us. But the Prophet, as I have said, when he saw that the Jews by their cavils made evasions, could not deal with them in any other way than by shewing that, they had violated God’s covenant and had thus become apostates, having wholly departed from the law. And he says that this was commanded them by God: nor is there doubt but that God not only suggested this to his servant, but dictated also to him the way and manner of speaking.