The Truth of the Resurrection (15:1-58).
Paul now seeks to end his letter by outlining to the Corinthians as a whole the true Gospel of Christ. He had begun emphatically with the cross (1 Corinthians 1:17-18). He now confirms its importance and comes to detailed proof and treatment of the resurrection. And this was partly because there were some among them who were denying the resurrection of the body. This probably indicated such a belief in their 'spiritual' state that they considered that they did not need a resurrection but would live on in the spirit in the angelic world in which they considered that they already partook by speaking in tongues. Seemingly they were beginning to fall away from the idea that redemption was necessary. Paul therefore seeks to bring out that the truth is more specific than that. God's purposes must be completed from beginning to end. Redemption for man is necessary. And he can only enter into the fullness of spiritual life through a physical resurrection. It is an essential part of God's final triumph. Thus the doctrine of the resurrection of the dead repudiates finally the position of these people.
While the theme appears new it is closely connected with what has gone before. It is a reminder that we have not yet achieved full spirituality. We are still fleshly. Thus the idea of some of the Corinthians that they were above all fleshly things and parallel with the angels was shown to be false.
He commences with the facts of the Gospel which immediately repudiate their position.