The folly of trusting in an arm of flesh is again pointed out, but only while dwelling on the true means of deliverance. Jehovah at Jerusalem would be in the midst of the nations as a lion among the shepherds, and would defend Jerusalem as birds hovering over it. His presence should overthrow the Assyrian, and cause him to flee; for the fire of Jehovah shall be in Zion, and His furnace in Jerusalem.