This is a bitter-sweet ending to our Isaiah study. Actually, Isaiah’s ending, like the ending of the Canon, is also bitter-sweet. It is bitter for all engaged in hypocritical worship (Isaiah 66:3). It is sweet for all true worshippers described in Isaiah 66:2. The rest of the chapter describes what will happen to people in either category. In Isaiah 66:4, 15-16, 22-24 we see visions of complete destruction and complete deliverance. Isaiah ends (Isaiah 66:24) where it began (Isaiah 1:2): the subject of rebels and rebellion. And all this drives us to make sure that we are the worshipers who will inhabit God’s new heavens and new earth. Our Lord Jesus Christ makes it possible for us to become a child of God. Christ’s sacrifice is seen in His perfect life where He is the contrast to those described in Isaiah 66:4 and also in His substitutionary death for sinners (cf. Isaiah 66:15-16 and Christ suffering under the fiery wrath of God for our sakes). All along, Isaiah has been urging us, like Peter, to be all the more diligent to make our calling and election sure in light of His return. This response will help us slow the tide of the Church becoming more and more like society and less and less like the Savior.