Matthew Henry on Isaiah 62:1-5

The Son of God here assures his church of his unfailing love, and his pleading for her under all trails and difficulties. She shall be called by a new name, a pleasant name, such as she was never called by before. The state of true religion in the world, before the preaching of the gospel, no man seemed to have any real concern for. God, by his grace, has wrought that in his church, which makes her his delight. Let us thence learn motives to holiness. If the Lord rejoices over us, we should rejoice in his service.