Why is the resurrection important in Christianity?

The resurrection is pivotal to the Christian faith as it validates the claims of Jesus as the Son of God and confirms that He has conquered death. As stated in 1 Corinthians 15:20, 'But now is Christ risen from the dead, and become the firstfruits of them that slept.' His resurrection assures believers of their future resurrection and the hope of eternal life. It serves as the cornerstone of the faith, providing proof that sin has been defeated and that believers will also rise in glory.