What does 1 Corinthians 15:23 mean?
Paul is correcting a mistaken idea among some of the Corinthians that Christians will never be resurrected in bodily form. They apparently believed as taught by the culture around them: that either death is the end of a person completely or that only the spirit goes on into some vague afterlife. Paul is showing that, instead, Christians will be resurrected to full, physical life just as Christ was after His crucifixion.Now Paul describes the order in which this will take place, starting with "Christ the firstfruits." Paul refers to Jesus this way since He was the first of the harvest of those who have died to be resurrected (1 Corinthians 15:20). Sometime later, all those who belong to Christ will be resurrected at His coming or return to the earth (1 John 3:2). Jesus promised to return for His people in John 14:2–3. Paul shows that the fulfillment of that promise will include the physical resurrection from the dead of all who belong to Him (1 Corinthians 15:51).
First Corinthians 15:12–34 describes all the implications for Christians if there is no resurrection, at all. Most importantly, that would mean that Christ was not raised from the dead. If Christ was not raised, then Paul's preaching of the gospel was false, and the faith of those who believed it was worthless. All remain in their sins. Christ, though, was raised from the dead, and when He returns for those who are His, all who have died in Christ will be resurrected to new life, as He was after the crucifixion. Finally, Christ will reign on earth before delivering the kingdom to the Father.
Paul provides thorough teaching about the resurrection of Christians from the dead. This is a direct counter to some group of Corinthians who did not believe in such a resurrection. He shows that natural death is not the end of life for Christians; it is the last step before receiving a glorified, resurrected body like that of the risen Christ. That ''spiritual'' body will be as different from our current bodies as a star is from a fish. In that moment, for all who have believed in Christ, living and dead, death will be defeated for good.