Sorry it has been a while since I posted.
This section of Isaiah is about a specific time the king of Assyria came against Israel. The Assyrian king reminded them of the others they had conquered before but the Jews would not cave in. Then they asked Isaiah to pray and God said that the Assyrian king would be called away and destroyed. How often do things threaten to destroy us? We must rest on and seek God when these things come. Trusting in His promise to take care of us and be with us.