2. It is a spiritual judgment with which God threatens to punish them for their spiritual wickedness (v. 14): I will proceed to do a marvellous work. They did one strange thing; they removed all sincerity from their hearts. Now God will go on and do another; he will remove all sagacity from their heads. The wisdom of their wise men shall perish. They played the hypocrite, and thought to put a cheat upon God, and now they are left to themselves to play the fool, and not only to put a cheat upon themselves, but to be easily cheated by all about them. Those that make religion no more than a pretence, to serve a turn, are out in their politics; and it is just with God to deprive those of their understanding who part with their uprightness. This was fulfilled in the wretched infatuation which the Jewish nation were manifestly under, after they had rejected the gospel of Christ; they removed their hearts far from God, and therefore God justly removed wisdom far from them, and hid from their eyes the things that belonged even to their temporal peace. This is a marvelous work; it is surprising, it is astonishing, that wise men should of a sudden lose their wisdom and be given up to strong delusions. Judgments on the mind, though least taken notice of, are to be most wondered at.