1 Corinthians 15:9-19

9 For I am the least of all the apostles - I do not even deserve to be called an apostle, because I persecuted God's church. 1
10 But by God's grace I am what I am, and the grace that he gave me was not without effect. On the contrary, I have worked harder than any of the other apostles, although it was not really my own doing, but God's grace working with me.
11 So then, whether it came from me or from them, this is what we all preach, and this is what you believe.
12 Now, since our message is that Christ has been raised from death, how can some of you say that the dead will not be raised to life?
13 If that is true, it means that Christ was not raised;
14 and if Christ has not been raised from death, then we have nothing to preach and you have nothing to believe.
15 More than that, we are shown to be lying about God, because we said that he raised Christ from death - but if it is true that the dead are not raised to life, then he did not raise Christ.
16 For if the dead are not raised, neither has Christ been raised.
17 And if Christ has not been raised, then your faith is a delusion and you are still lost in your sins.
18 It would also mean that the believers in Christ who have died are lost.
19 If our hope in Christ is good for this life only and no more, then we deserve more pity than anyone else in all the world.