Redemption is one of the most important concepts for Christians to understand and is what separates Christians from all other religions. In every other religion, man must do something to appease their god(s), to satisfy their requirements. Only in Christianity does God take the initiative to satisfy His own requirements on behalf of man. In this chapter, the prophet gives several illustrations to show us what this looks like. An expository sermon from Isa. 54. Sermon begins at about 17:30.