The point is not that the resurrection is the price paid for our sins. The point point is that the resurrection proves 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.
John PiperWhy don't people ask us about our hope? The answer is probably that we look as if we hope in the same things they do. Our lives don't look like they are on the Calvary road, stripped down for sacrificial love, serving others with the sweet assurance that we don't need to be rewarded in this life.
John PiperGod has given us prayer as a wartime walkie-talkie so that we can call headquarters for everything we need as the kingdom of Christ advances in the world. Prayer gives us the significance of front-line forces, and gives God the glory of a limitless Provider. The one who gives the power gets the glory. Thus prayer safeguards the supremacy of God in missions while linking us with endless grace for every need.
John Piper