Songs of praise are written to glorify God, giving them a universality that allows them to be shared between believers across time, across languages, and across cultures. The Psalms have been translated and adapted over the centuries to be sung in synagog.
To have our identity in Christ means that we understand our destination to be the same as Jesus. We understand that His resurrection is our resurrection. What does this mean practically? It means that this world is not our home. The kingdoms of this world.