As Christians read Psalm 48, they need to look towards the future fulfillment of this psalm. The eschatological aspect this psalm looks forward to the New Jerusalem. New Jerusalem will be a secured city, which will be inhabited by those who have been joyfully delivered by the Lord Jesus Christ. In that future Kingdom, all the people of God will come to the Temple in New Jerusalem and worship the King. Perhaps, as they come to worship, they too will sing this song of joyful deliverance!
