“Israel’s history has become our history. We are part of the one people of God and the psalms of Jerusalem and Zion are fully ours.
Psalm 48 is not the local history of a little city, but it has significance for the ends of the earth. Indeed, we can appreciate this psalm and all of the Old Testament in a way that the old covenant people could not.
They had the promise; we have the fulfillment. They had the sons of Korah who wrote this psalm; we have Jesus who fulfilled this psalm.
They sang in praise of the earthly Jerusalem; we sing in praise of the heavenly Jerusalem.”
Godfrey, W. Robert. Learning to Love the Psalms (p. 101).