How can a sea be utterly destroyed? How can a river be struck into seven streams? This passage isn't just describing geographical changes; it's painting a picture of God's absolute sovereignty over creation.
Isaiah 11:15 uses dramatic imagery, drawing from the Exodus, to show God's power to remove any obstacle.
Unmaking the Sea
The "tongue of the Egyptian sea" likely refers to the Gulf of Suez, a formidable barrier. To "utterly destroy" it means to make it completely passable, not just divided as in the Exodus. This signifies God's ability to erase obstacles entirely.
Reshaping the River
The "river" here could be the Nile or the Euphrates, both significant waterways. "Smite it into seven streams" suggests God can break down even mighty rivers, creating numerous, shallow channels where people can walk "dry-shod" (without getting their feet wet).
The Purpose: A Highway
These aren't just displays of power. They are acts of preparation. God is clearing a path, making a "highway" for His people to return and to find peace. It's a promise that no barrier, however natural or imposing, can stand against God's plan for His people.