Why is the concept of a heavenly city important for Christians?

The notion of a heavenly city is vital for Christians as it signifies the ultimate destination of believers, where sin and sorrow will be non-existent. As outlined in Hebrews 11:14, the desire for a 'better country' motivates believers to cling to their faith and reject worldly temptations. This expectation instills hope, encouraging Christians to endure life's challenges and remain steadfast in their faith, knowing that God has prepared an eternal home for them, as affirmed by the promise of Jesus in John 14:1-3.