St. Paul's belief in the reality of the Resurrection makes him assert that if there were no resurrection then

In 1 Corinthians, St. Paul argues that the resurrection of Jesus Christ is a fundamental tenet of the Christian faith, and without it, the faith itself would be meaningless. He further argues that if there is no resurrection of the dead, then Christ himself has not been raised from the dead, and if Christ has not been raised, then the Christian faith is in vain. Moreover, if Christ has not been raised, then believers' faith is futile, and they are still in their sins. Finally, if there is no resurrection, then Christians who have already died have perished, and their faith and hope in Christ were for nothing. Therefore, St. Paul asserts that the resurrection of Christ is a critical element of the Christian faith, and without it, the faith itself would be meaningless.