Complete Commentary on the Whole Bible, by Matthew Henry, at sacred-texts.com
(Psa 98:1-3) The glory of the Redeemer.
(Psa 98:4-9) The joy of the Redeemer.
A song of praise for redeeming love is a new song, a mystery hidden from ages and generations. Converts sing a new song, very different from what they had sung. If the grace of God put a new heart into our breasts, it will put a new song into our mouths. Let this new song be sung to the praise of God, in consideration of the wonders he has wrought. The Redeemer has overcome all difficulties in the way of our redemption, and was not discouraged by the services or sufferings appointed him. Let us praise him for the discoveries made to the world of the work of redemption; his salvation and his righteousness fulfilling the prophecies and promises of the Old Testament. In pursuance of this design, God raised up his Son Jesus to be not only a Light to lighten the Gentiles, but the glory of his people Israel. Surely it behoves us to inquire whether his holy arm hath gotten the victory in our hearts, over the power of Satan, unbelief, and sin? If this be our happy case, we shall exchange all light songs of vanity for songs of joy and thanksgiving; our lives will celebrate the Redeemer's praise.
Let all the children of men rejoice in the setting up the kingdom of Christ, for all may benefit by it. The different orders of rational creatures in the universe, seem to be described in figurative language in the reign of the great Messiah. The kingdom of Christ will be a blessing to the whole creation. We expect his second coming to begin his glorious reign. Then shall heaven and earth rejoice, and the joy of the redeemed shall be full. But sin and its dreadful effects will not be utterly done away, till the Lord come to judge the world in righteousness. Seeing then that we look for such things, let us give diligence that we may be found of him in peace, without spot, and blameless.