With gladness and rejoicing shall they be brought: they shall enter into the king's palace.

Jamieson-Fausset-Brown Bible Commentary

15. shall they be brought-in solemn form (compare Job 10:19; 21:22). The entrance into the palace with great joy closes the scene. So shall the Church be finally brought to her Lord, and united amid the festivities of the holy beings in heaven.

Matthew Henry's Concise Commentary

45:10-17 If we desire to share these blessings, we must hearken to Christ's word. We must forget our carnal and sinful attachments and pursuits. He must be our Lord as well as our Saviour; all idols must be thrown away, that we may give him our whole heart. And here is good encouragement, thus to break off from former alliances. The beauty of holiness, both on the church and on particular believers, is, in the sight of Christ, of great price, and very amiable. The work of grace is the workmanship of the Spirit, it is the image of Christ upon the soul, a partaking of the Divine nature. It is clear of all sin, there is none in it, nor any comes from it. There is nothing glorious in the old man or corrupt nature; but in the new man, or work of grace upon the soul, every thing is glorious. The robe of Christ's righteousness, which he has wrought out for his church, the Father imputes unto her, and bestows upon her. None are brought to Christ, but those whom the Father brings. This notes the conversion of souls to him. The robe of righteousness, and garments of salvation, the change of raiment Christ has put upon her. Such as strictly cleave to Christ, loving him in singleness of heart, are companions of the bride, who partake of the very same grace, enjoy the same privileges, and share in one common salvation. These, every one, shall be brought to the King; not one lost or left behind. Instead of the Old Testament church, there shall be a New Testament church, a Gentile church. In the believing hope of our everlasting happiness in the other world, let us always keep up the remembrance of Christ, as our only way thither; and transmit the remembrance of him to succeeding generations, that his name may endure for ever.