Therefore, behold, I will proceed to do a marvellous work among this people, even a marvellous work and a wonder: for the wisdom of their wise men shall perish, and the understanding of their prudent men shall be hid.
A marvelous work - (Habakkuk 1:5; Acts 13:41.) The "marvelous work" is one of unparalleled vengeance on the hypocrites (cf. "strange work," Isaiah 28:21).
The understanding of their prudent (men) shall be hid - the judgment will visit the wise in that respect in which they most prided themselves; their wisdom shall be "hid" - i:e., shall no longer appear, so as to help the nation in its distress (cf. 1 Corinthians 1:19).