62:1-6 screams "Jesus!" to me, and it's terrifyingly strong. He is both mighty to save and mighty to execute vengeance against the evil. He brings redemption AND wrath. In 63 we see the same double-edged sword of God's loving kindness. God chooses and protects His people, but when their rebellion against the Lord rejects the blessings of provision that He has given them, the Lord Himself afflicts them, hardens their hearts in keeping with their rebellion, and fights against them. In essence, as the people of God's own choosing, they become unrecognizable as those called by His name and blessed for the sake of His own glory. It's a sad and cautionary tale for us all.