Why is understanding the city of God important for Christians?

Understanding the city of God is crucial for Christians as it signifies our citizenship in heaven and our belonging to God's people. In Psalm 87, the joyous declaration of Zion as the city of God reminds us that we are part of the divine lineage, comprised of all saints redeemed by Christ's sacrifice. Our identities are intertwined with this city, which is not just a physical place, but a reality where God's presence dwells among His people, guiding us to live according to His purpose and grace.