4:1-8 The nations have not yet so submitted to the Prince of Peace, as to beat their swords into ploughshares, nor has war ceased. But very precious promises these are, relating to the gospel church, which will be more and more fulfilled, for He is faithful that has promised. There shall be a glorious church for God set up in the world, in the last days, in the days of the Messiah. Christ himself will build it upon a rock. The Gentiles worshipped their idol gods; but in the period spoken of, the people will cleave to the Lord with full purpose of heart, and delight in doing his will. The word halteth, describes those who walk not according to the Divine word. The collecting the captives from Babylon was an earnest of healing, purifying, and prospering the church; and the reign of Christ shall continue till succeeded by the everlasting kingdom of heaven. Let us stir up each other to attend the ordinances of God, that we may learn his holy ways, and walk in them, receiving the law from his hands, which, being written in our hearts by his Spirit, may show our interest in the Redeemer's righteousness.
6. assemble her that halteth—feminine for neuter in Hebrew idiom, "whatever halteth": metaphor from sheep wearied out with a journey: all the suffering exiles of Israel (Eze 34:16; Zep 3:19).
her … driven out—all Israel's outcasts. Called "the Lord's flock" (Jer 13:17; Eze 34:13; 37:21).