John Chrysostom
Notice how the Apostle, after indicating the cause of His death, turns it into proof of the resurrection. Why was Christ crucified, you ask? Not for His own sin, as is clear from His resurrection. If He had been sinful, how would He have risen? But if He rose, it is clear that He was not sinful. And if He was not sinful, why was He crucified? For the sake of others. And if for others, then undoubtedly He also rose. Lest you object, “How can we be justified, being guilty of so many sins?” the Apostle pointed to Him who blotted out all sins. He did this to confirm his teaching on justification, both by Abraham's faith, through which he was justified, and by faith in the saving Passion, through which we were freed from sins. Speaking of Christ's death, he speaks also of the resurrection. Christ did not die in order to subject us to punishment and condemnation, but to benefit us. He both died and rose in order to make us righteous.