The resurrection of Christ, then, is necessary to prove and show that his payment for sin was full and final. He finished paying sin’s penalty! He rose from the dead!" -Bruce Ware, Big Truths for Young Hearts
When Christ was raised from the dead, it was God’s declaration of approval of Christ’s work of redemption. Because Christ "humbled himself & became obedient unto death, even death on a cross" (Phil. 2:8), "God has highly exalted him…" (Phil. 2:9). By raising Christ from the dead, God the father was in effect saying that he approved of Christ’s work of suffering and dying for our sins, that his work was completed, and that Christ no longer had any need to remain dead. There was no penalty left to pay for sin, no more wrath of God to bear, no guilt remained. In the resurrection, God was saying to Christ, "I approve of what you have done, and you find favor in my sight. -Wayne Grudem, Systematic Theology
Jesus resurrection demonstrated his victory over death, vindicated him as righteous, and indicated his divine identity. It led on to his ascensions and enthronement; and his present heavenly reign. It guarantees the believer’s present heavenly reign. It guarantees the believers present forgiveness and justification and it is the basis of resurrection life in Christ for the believer here and now. -J.I. Packer, Concise Theology
Now may the God of peace who brought again from the dead our Lord Jesus, the great shepherd of the sheep, by the blood of the eternal covenant, equip you with everything good that you may do his will. Hebrews 13:20-21
The death of Christ did not merely precede his resurrection-it was the price that obtained it. That’s why Hebrews 13:20 says that God brought him from the dead “by the blood of the eternal covenant.”
The “blood of the …covenant” is the blood of Jesus. As he said, “This is my blood of the covenant” (Matthew 26:28). When the Bible speaks of the blood of Jesus, it refers to his death. No salvation would be accomplished by the mere bleeding of Jesus. His bleeding to death is what makes his blood-shedding crucial…
The wrath of God was satisfied with the suffering and death of Jesus. The holy curse against sin was fully absorbed. The obedience of Christ was completed to the fullest measure. The price of forgiveness was totally paid. The righteousness of God was completely vindicated. All that was left to accomplish was the public declaration of God’s endorsement. This he gave by raising Jesus from the dead. When the Bible says, “If Christ has not been raised, your faith is futile and you are still in your sins” (1 Corinthians 15:17), the point is not that the resurrection is the price paid for our sins. The point is that the resurrection proves that the death of Jesus is an all-sufficient price. If Jesus did not rise from the dead, then his death was a failure, God did not vindicate his sin-bearing achievement, and we are still in our sins.
But in fact “Christ was raised from the dead by the glory of the Father” (Romans 6:4). The success of his suffering and death was vindicated. And if we put our trust in Christ, we are not still in our sins. For “by the blood of the eternal covenant,” the Great Shepherd has been raised and lives forever. -John Piper, Fifty Reasons Why Jesus Came To Die