When we speak of Christ’s work on the cross, most of our emphasis is on his sacrifice which became the basis for our forgiveness.
But we have a dual problem. Genesis 3 instituted sin and death as consequences for Adam and Eve “breaking the planet.”
The prediction of the Messiah coming to break the curse must include the reversal of BOTH sin and death.
Jesus living the perfect life (Hebrews 4:15) took care of the sin issue.
No other sacrifice for sin in the Old Testament overcame the power of death. We never saw an animal come back to life after it was offered for sin.
By rising from the dead, Christ fully broke the curse of sin AND death.
The resurrection is key to our salvation and our hope in a future resurrection of eternal life with Christ.