God Saves His Stubborn Children from Self-Salvation

Isaiah 30:18-26

Verse 18 is a glorious hinge. Up to this point, we read nothing but God’s disapproval of the attitudes and actions of his people. But God is still yearning to show them mercy, rising to show them compassion. He waits until just the right moment and then takes sovereign initiative to pour out grace on his sinful people: “All who wait patiently for him are happy.”

The first step in the salvation journey is in verse 19, as the Lord works in them to call on him for salvation. God knows exactly what we need for salvation, but he will not act until we call on him to do it. We see this in Jesus’s healing of Bartimaeus. This man was crying aloud, “Have mercy on me!” and everyone in the crowd knew exactly what this blind man wanted. But Jesus stood in front of him and said, “What do you want me to do for you?” (Mark 10:51). So also in Isaiah 30:19, God waits on the people to cry for help. As soon as he hears, he saves!

The next step is in verses 20-21: God radically transforms the hearts of his people to hear and obey his word. They will hear their Teacher’s voice speaking plainly to them, “This is the way. Walk in it.” This is ultimately fulfilled in the new covenant promise of the indwelling Holy Spirit, “the Spirit of truth [who] will guide you into all truth” (John 16:13), who writes God’s laws in the minds and hearts of his people then compels them to walk in that way (Ezek 36:26-27; Rom 8:4; Heb 8:10-11). Their rebelliousness ends when their hearts are so transformed.

The next step occurs when, under the transforming influence of the Spirit of God, the people defile their formerly precious idols, casting them away forever in holy zeal (v. 22). The redeemed people of God then live only for the glory of his name.

The final step of salvation refers to the land, cursed and damaged because of human sin. In the narrow focus, verses 23-26 refer to the restoration of the land of Judah after the Assyrian invasion. The promised land will be healed, the rain will fall, the rivers and streams will flow freely, the harvests will be rich and abundant, the livestock will be richly fed, and even the sunlight and moonlight will be brighter and more beautiful than ever before. But these words must find their ultimate fulfillment in the new heaven and new earth, that perfect world freed forever from the curse of decay and death (Rom 8:21).

Isaiah 30:27-33

The final section of this chapter is one of the most terrifying depictions of the wrath of God in the writings of the Old Testament prophets. Verse 27 says literally, “The name of the Lord comes from afar,” meaning that the wrath of God is poured out for the sake of his name. The approach of the name of the Lord is with fiery emblems of wrath and terror (v. 27). His breath pours out a rising torrent of fire on all nations. He sifts all nations in a sieve of destruction, and all are consumed. Verse 28 specifically teaches God’s power to orchestrate the history of nations to achieve their just destruction. The devastation of Assyria is only one example. The destruction of all wicked, oppressive nations will result in an overflowing celebration by the people of God (v. 29). Verses 30-33 depict in vivid language a fire pit, called Topheth, where the torrent of God’s wrath sets ablaze kings and whole nations that have rebelled against him. It is a clear foretaste of hell, the lake of fire, described so vividly in Revelation 14 and 20.

Perhaps the corpses of the 185,000 Assyrian troops that God slaughtered were collected and burned in the valley of Ben Hinnom, the smoldering garbage pit outside the walls of Jerusalem. Jesus used this as a vivid picture of hell (Matt 10:28; Gk gehenna). This will be the final image of the book of Isaiah: “They will see the dead bodies of those who have rebelled against me; for their worm will never die, their fire will never go out, and they will be a horror to all mankind” (66:24). Though God works salvation for sinners with amazing grace, he also will pour out a river of fire on all his enemies.

This chapter has powerful themes pointing to the gospel of Jesus Christ. The ultimate threat we face is not an Assyrian invasion but death and eternal condemnation in hell. Woe to any person who thinks he can escape that judgment by clever means of self-salvation. God wants us to forsake those efforts and flee to Christ. God still makes the same gracious offer as he did to Judah in verse 15: in repentance and quiet faith in Jesus comes our rest and our refuge; there is no other (“Come to me, all of you who are weary and burdened, and I will give you rest,” Matt 11:28; “There is salvation in no one else, for there is no other name under heaven given to people by which we must be saved,” Acts 4:12). God is still longing to be gracious to all sinners who call on his name in faith (Isa 30:18). And God works the same steps of salvation now as then: He moves us to call on his name, he transforms our hearts to obey his Word, he puts the indwelling Spirit in us to guide our steps moment by moment, and he will transform the universe and make it glorious. This is the gospel we must proclaim to all the nations, telling them all there is one way, and only one way, of escape from the coming wrath of God: faith in Christ.