"Sing to the LORD a new song, for he has done marvellous things." (Psalm 98:1)
Psalm 98 is the companion to Psalm 96 and shares its missionary energy. Sing to the LORD a new song, for he has done marvellous things; his right hand and his holy arm have worked salvation for him. The salvation celebrated is both already accomplished and still unfolding: the LORD has made his salvation known to the nations, revealed his righteousness. But the psalm then looks forward to a final coming in which all the earth, the sea, the rivers, and the mountains will acclaim the King who comes to judge the earth in righteousness.
The call to worship in this psalm is all-encompassing: Israel is called, then all the earth, then the sea, then rivers and mountains. The inanimate creation joins the choir. This is not poetry alone. The Catechism teaches, following Romans 8, that the whole creation is waiting for the revelation of the children of God, groaning in expectation of the liberation that Christ will bring at the end (CCC 1046). The seas roar and the rivers clap their hands because they know, in the mysterious way creation knows, that their liberation is coming with the Lord who made them.
Brothers and sisters, the marvellous things of Psalm 98 are the things God has done in your life that only you know about: the rescue no one else saw, the grace that came at the exact moment of greatest need. These are your marvellous things. Sing them. Not just to God in private prayer but to someone else who needs to hear what he does for those who trust him.
Lord God, you have done marvellous things. Your right hand and holy arm have worked salvation. Let the whole earth sing a new song, and let our voices join the seas and rivers and mountains in the choir that welcomes your coming in righteousness. Through Christ our Lord. Amen.