But whoever believes in His resurrection cannot fail to believe also in the resurrection of all. Therefore it is natural to ask such people: how could Jesus Christ rise when others can never rise? And from another side: why did Jesus Christ rise if He did not intend, in His own likeness, to raise all who believe in Him from death to eternal life?
In that case one must renounce faith in Christ's resurrection. But this means renouncing all Christianity. It means recognizing the whole Gospel preaching as vain, along with all that was lived through and felt, and the whole grace-filled life manifested among the Corinthians in such a great diversity of spiritual gifts.
More than this: to reject Christ's resurrection and the universal resurrection means to present the Apostles as false witnesses. It means to blaspheme God Himself, who raised Christ and sent the Apostles to proclaim this. Finally, it means to suppose that the work of redemption from sins was not accomplished.
For the chief victory over the father of evil, the devil, was manifested through Christ's descent into Hades and resurrection. If this victory did not occur, then deceased Christians remain defenseless victims of Hades.
Perhaps some earthly Christian hopes remain? But the Apostle has shown earlier that Christians have no glorious earthly hopes, but only labors and struggles. From this side, they are the most pitiable of all people (cf. ch. 4:9-13).
Thus unbelief in Christ's resurrection and in the universal resurrection leads to the most destructive, dangerous, and comfortless conclusions. Faith in the resurrection leads to something wholly different, as the Apostle shows further.