Psalm 98:1

New Catholic Bible

¹A psalm.

Sing to the Lord a new song,^[b]
for he has accomplished marvelous deeds.
His right hand and his holy arm
have made him victorious.

Psalm 98:1 Israel has returned from the Exile; God has saved her, and the whole world is a witness of it. Hence, the Lord is pursuing his project of salvation. Let all peoples acclaim him as their sovereign and let joy burst out over the whole face of the earth, for God comes to inaugurate a kingdom of peace and justice for all humanity. The same worldwide perspective is glimpsed in the second part of the Book of Isaiah (Isa 40–55) with which the psalms of the kingdom have much in common.
The previous psalm brought to mind the second coming of Christ. This psalm recalls the first coming of the Lord and the faith of all peoples. Hence, the Christian Liturgy uses it during the Christmas season, since the latter is so filled with joy at the coming of the Lord, the Savior of all human beings.
Psalm 98:1 God’s deliverance of Israel from the Exile, a type of the Messianic redemption, is such a wondrous deed that it deserves to be praised in song. New song: see note on Ps 33:3. Marvelous deeds: see note on Ps 9:2. His right hand and his holy arm: God is portrayed as a champion warrior.

New Catholic Bible (NCB)