(a) He prophecies that all nations will come to the knowledge of God, who then was only known in Judea.
66:1 All lands - Ye people of all nations. He invites the Gentile world, to the contemplation and celebration of God's works.
66:1-7 The holy church throughout all the world lifts up her voice, to laud that Name which is above every name, to make the praise of Jesus glorious, both by word and deed; that others may be led to glorify him also. But nothing can bring men to do this aright, unless his effectual grace create their hearts anew unto holiness; and in the redemption by the death of Christ, and the glorious deliverances it effects, are more wondrous works than Israel's deliverance from Egyptian bondage.
