John Calvin's Bible Commentary
Jeremiah 23:27
Then follows a clearer definition, that they made his people to forget his name by their dreams, as their fathers had forgotten it through Baal. (109) We may infer from this verse, that those with whom Jeremiah contended were not openly the enemies of the Law; for they held many principles of true religion. They maintained in common with the true and sincere worshippers of God this truth, — that the only true God ought to be worshipped; and also this, — that there was only one legitimate altar on which sacrifices according to the Law were to be offered. On these points, then, there was no controversy. But yet they deceived the people by their flatteries; for they made gain of their prophetic office. Hence Jeremiah condemns them, because they made God’s name to be forgotten by their dreams, as their fathers had forgotten it through Baal; as though he had said, “These dreams are like the fictitious and spurious forms of worship, by which true religion was formerly subverted; for their fathers worshipped Baal and Baalim: they set up for themselves these false gods, and thus subverted the glory of God by their own devices.” The impiety of the false prophets, who lived in the time of Jeremiah, was not indeed so gross; and yet it was an indirect defection, for they brought forward their dreams, and falsely professed that. they were God’s servants, though he had not commissioned them.
We have said elsewhere (Jeremiah 23:21) that their crime was twofold; first, they ran when not called nor sent; and secondly, they brought forward their own fancies and not the word of God. And this passage ought to be carefully noticed; for we here learn, that not only open defection cannot be endured by God, but also indirect depravations, which stealthily withdraw us from the fear of God. Then these two evils must be carefully avoided in the Church, if we desire to continue entire in our obedience to God. One evil is sufficiently known, that is, when truth is openly turned into falsehood, when men are drawn away into idolatry and filthy superstitions, or when the ancient people, as Jeremiah says, forgat the name of God through Baal. But the other evil is more hidden, and therefore more dangerous, that is, when some appearance of true religion is retained, and men are yet insidiously drawn away from the fear of God and his true worship, and from pure doctrine, as we see to be the case at this day in the Churches, which profess to have separated from the Papacy that they might embrace the doctrine of the Gospel: there are many among them who insidiously corrupt the simple and genuine doctrine of the Gospel. We see how many curious men there are at this time, who disturb all things by their own inventions, and how absurdly many seek refinements, and how confidently also do many propound their own inventions as oracles! It behoves us then to be watchful, not only that we may shun open abominations, but that we may also retain the pure and true word of God, so as not to allow false workers insidiously to corrupt and vitiate anything. It follows, —