Nehemiah 12 highlights the importance of our worship gathering. Our Sunday services are not meaningful because we gather but what makes it meaningful is the reason that we are gathered for. The people of God have gathered to celebrate the goodness and faithfulness of God, similarly that's why we 21st century people of God gather together too. The difference is that we have a greater reason than our ancient predecessors. We are not motivated by a finished wall, but by the finished work of Christ.