Why is the doctrine of eternal life important for Christians?

Eternal life is central to the Christian faith, serving as the foundation of hope and assurance. According to John 10:28, Jesus assures His believers that 'I give unto them eternal life; and they shall never perish.' This promise transcends doubts and fears that may arise through life's challenges, affirming that salvation is a divine gift, not based on human effort or performance. Understanding the doctrine of eternal life instills in believers a sense of peace and security, knowing that their salvation is firmly established in God's sovereign grace, rendering them impervious to eternal separation from Him.