God’s Comforting Oath (Isaiah 45:23)

Israel is in exile when Isaiah writes chapter 45.  You would think that all is lost because Israel has failed, they are in a foreign land, and God should be done with them.  The Lord does not discard his people, but binds himself to deliver his people out of exile.  What does this deliverance teach us about God’s name?  What does this deliverance teach us about the Lord’s redemptive promise?