Isaiah began his “Book of Consolations” (Ch 40-66) by promising that “the glory of the Lord shall be revealed” (40:5). Now he concludes by describing that glory for us.
The theme is about the glory of the nations of Israel during the millennium kingdom. Most commentaries agree that this is a prophesy about Israel the nation, but the church. Israel would know that Jesus Christ is their Savoir (v16).
This is one of the glories chapter in the whole Isaiah.