Verse 21. - To declare the Name of the Lord in Zion; rather, as in the Revised Version, that men may declare. The great object of Israel's restoration was the glory of God - that Jew and heathen, joined together in one, might unitedly bless God, and praise his glorious Name. The complete fulfilment was, of course, only after the coming of Christ. And his praise in Jerusalem. Especially in the "new Jerusalem" (see the comment on ver. 15).

102:12-22 We are dying creatures, but God is an everlasting God, the protector of his church; we may be confident that it will not be neglected. When we consider our own vileness, our darkness and deadness, and the manifold defects in our prayers, we have cause to fear that they will not be received in heaven; but we are here assured of the contrary, for we have an Advocate with the Father, and are under grace, not under the law. Redemption is the subject of praise in the Christian church; and that great work is described by the temporal deliverance and restoration of Israel. Look down upon us, Lord Jesus; and bring us into the glorious liberty of thy children, that we may bless and praise thy name.To declare the name of the Lord in Zion,.... That is, that the prisoners and persons appointed to death, being loosed, might declare, in the church, what great things the Lord has done for them; and so speak well of his wisdom, power, grace, and goodness, in their deliverance; profess his name, and confess him before men, and express a value for his name, and show forth the honour of it, and seek his glory:

and his praise in Jerusalem; the Gospel church state, the same with Zion; when it shall be the praise of the whole earth; then and there will those, that are delivered from the antichristian yoke, praise the Lord, sing the song of Moses and the Lamb, and glorify God for all that he has done for them.