Why is the doctrine of grace emphasized in the book of Revelation?

The book of Revelation unfolds the doctrine of grace by demonstrating how God's unmerited favor towards sinners leads to their redemption through Christ. This doctrine is not merely about forgiveness; it emphasizes that salvation is entirely by grace through faith in Jesus Christ, who shed His blood for our sins. Revelation reassures believers that God's grace sustains them amidst trials, keeping them connected to Christ and the hope of eternal life. This assurance that they are saved by grace empowers Christians to joyfully live out their faith, actively depending on the work of Christ rather than their own efforts.