26:1-4 That day, seems to mean when the New Testament Babylon shall be levelled with the ground. The unchangeable promise and covenant of the Lord are the walls of the church of God. The gates of this city shall be open. Let sinners then be encouraged to join to the Lord. Thou wilt keep him in peace; in perfect peace, inward peace, outward peace, peace with God, peace of conscience, peace at all times, in all events. Trust in the Lord for that peace, that portion, which will be for ever. Whatever we trust to the world for, it will last only for a moment; but those who trust in God shall not only find in him, but shall receive from him, strength that will carry them to that blessedness which is for ever. Let us then acknowledge him in all our ways, and rely on him in all trials.

Verses 1-18. - A SONG OF THE REDEEMED IN MOUNT ZION. The prophet, having (in Isaiah 25.) poured forth his own thankfulness to God for the promise of the Church's final redemption and triumph, proceeds now to represent the Church itself in the glorified state as singing praise to God for the same. Verse 1. - In that day. In the "day of God" (2 Peter 3:12), the period of the "restitution of all things" (Acts 3:21). In the land of Judah; i.e. in the "new earth" - whose city will be the "heavenly Jerusalem," and wherein will dwell "the Israel of God" - the antitype whereof the literal "land of Judah" was the type. A strong city; literally, a city of strength. In the Revelation of St. John the new Jerusalem is represented as having "a wall great and high" (Revelation 21:12), and "twelve gates," three on each side. The intention is to convey the idea of complete security. In the present passage the city has "gates" (ver. 2), but no "walls" - walls and bulwarks being unnecessary, since the saving might of God himself would be its sure defense against every enemy.

In that day shall this song be sung in the land of Judah,.... When great things shall be done: for the church and people of God; and when antichrist and all their enemies are destroyed, as mentioned in the preceding chapter Isaiah 25:1; then this song shall be sung expressed in this throughout; which the Targum calls a "new" song, an excellent one, as the matter of it shows; and which will be sung in the land of Judah, the land of praise in the congregation of the saints, the professors and confessors of the name of Jesus: in Mount Zion, the church of God below, Psalm 149:1,

we have a strong city; not an earthly one, as Jerusalem; so the Jewish writers, Jarchi, Aben Ezra, and Kimchi, interpret it; nor the heavenly city, which God has prepared and built, and saints are looking for, and are citizens of: but rather the holy city, the New Jerusalem, described in Revelation 21:2 or however, the church of Christ, as in the latter day; which will be a "strong" one, being of the Lord's founding, establishing, keeping, and defending; and whose strength will greatly lie in the presence of God, and his protection of it; in the number of its citizens, which will be many, when Jews and Gentiles are converted; and in their union one with another, and the steadfastness of their faith in Christ; when a "small one", as the church is now, shall become a "strong nation", Isaiah 60:22,

salvation will God appoint for walls and bulwarks; instead of walls, ditches, parapets, counterscarps, and such like fortifications; what they are to cities, that is salvation to the church and people of God; it is their safety and security: as God the Father is concerned in it, it flows from his love, which is unchangeable; it is by an appointment of his, which is unalterable; is secured by election grace, which stands not upon the works of men, but the will of God; and by the covenant of grace, ordered in all things, and sure; and by his power the saints are kept unto it: as Christ is concerned in it, it is as walls and bulwarks; he is the author of it, has completely finished it, and has overcome and destroyed all enemies; his righteousness is a security from all charges and condemnation; his satisfaction a bulwark against the damning power of sin, the curses of the law, and the wrath of God; his mediation and intercession are a protection of saints; and his almighty power a guard about them. As the Spirit is concerned in it, who is the applier of it, and evidences interest in it; it is a bulwark against sin, against Satan's temptations, against a spirit of bondage to fear, against error, and a final and total falling away; particularly the church's "walls" will be "salvation", and her "gates" praise, of which in the next verse Isaiah 26:2, in the latter day glory; to which this song refers; see Isaiah 60:18.

26:1 In that day - When God shall do such glorious works, as are described in the foregoing chapter . Sung - In the church of God. A city - Jerusalem, or the church, which is often compared to a city. For walls - God's immediate and saving protection shall be to his church instead of walls.

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