Introduction
Some in Corinth had decided that resurrection of the body was unnecessary. The soul mattered; the body did not. It sounded sophisticated, and Paul treats it as an emergency.
He does not argue about it philosophically. He goes back to the message he first preached to them, names the witnesses, and then shows what collapses if the claim is false.
The main point: the resurrection is not the last chapter of the faith. It is the floor the whole house stands on.
I. The Message That Was Handed On (1 Corinthians 15:1-11)
Paul begins with something older than his letter — a summary he 'received' and 'passed on', probably the earliest Christian confession we have.
This is not private religious experience. It is a claim about an event, with names attached, offered for examination. Preach it with that confidence.
II. If Christ Has Not Been Raised (1 Corinthians 15:12-34)
Then Paul runs the alternative all the way to the bottom, and he does not flinch from where it leads.
But then: 'But Christ has indeed been raised from the dead, the firstfruits of those who have fallen asleep.' Firstfruits is a farming word. The first sheaf is not the whole harvest; it is the proof that the harvest is coming.
III. What Kind of Body, and What Kind of Life (1 Corinthians 15:35-58; Isaiah 25:7-8)
Someone always asks the mechanical question, and Paul answers it with a seed. 'What you sow does not come to life unless it dies.' There is real continuity and real transformation.
And then the ending nobody expects from a chapter this cosmic: 'Therefore, my dear brothers and sisters, stand firm. Let nothing move you. Always give yourselves fully to the work of the Lord, because you know that your labor in the Lord is not in vain.' The doctrine lands as a reason to keep working.
Conclusion & Appeal
That last verse is the pastoral gift of the chapter. Most faithful work looks unfinished. The class you teach, the person you keep visiting, the prayers you have prayed for years — you may never see the result.
The resurrection says none of it disappears. In a world where everything decays, the one thing that does not is what is done for the Lord.
So bring to mind the work you are closest to quitting. Not because it is wrong, but because it seems to be going nowhere. Then read that verse again and give it one more week. It is not in vain.