Jeremiah 4:21,22 - Joseph Benson’s Commentary on the Old and New Testaments

How long shall I see the standard, &c. This dreadful war continued a great while, not in the borders, but in the bowels of the country; for the people were very obstinate, and would not submit to, but took all opportunities of rebelling against, the king of Babylon, which did but lengthen out and aggravate the calamity, as Jeremiah did not fail to warn them it would do. Had they taken his advice, and yielded sooner, their country would have escaped the utter destruction which came upon it. But God, as a punishment for their sins, suffered them to be infatuated. For my people is foolish Some commentators have considered these words, as well as those preceding, as being spoken by God, in answer to the prophet's complaints of his grievous vision, to show that such sad images were presented to him, because, on account of the people's obstinacy and wickedness, it was necessary that they should feel the effects of his just anger, even until Jerusalem should be levelled with the ground. But the passage seems to suit the prophet much better, speaking here as one commissioned by the divine authority to preach to this people. They have not known me Namely, they have not known the Lord, in whose name the prophet speaks. Those are foolish indeed, who, calling themselves God's people, and having the advantage of becoming acquainted with him, yet have not known him. They are sottish children Stupid and senseless; and have no understanding They cannot distinguish between truth and falsehood, good and evil; cannot discern the mind of God, either in his word or in his providence; they do not understand what their true interest is, nor on which side it lies. They are wise to do evil To plot mischief against the quiet of the land; wise to contrive the gratification of their lusts, and then to conceal or palliate their conduct; but to do good they have no knowledge No contrivance, no application of mind; they know not how to make a good use either of the ordinances or providences of God, nor how to bring about any design for the good of their country. They are perfect strangers to the obligations of religion and virtue, and never show any quickness of thought but when they are contriving to bring about some mischief.