But if Christ is preached as raised from the dead, how can some among you say there is no resurrection of the dead?  If there is no resurrection of the dead, then neither has Christ been raised.  And if Christ has not been raised then empty too is our preaching; empty, too, your faith.  Then we are also false witnesses to God, because we testified against God that he raised Christ, whom he did not raise if in fact the dead are not raised.

For if the dead are not raised, neither has Christ been raised, and if Christ has not been raised, your faith is vain; you are still in your sins.  Then those who have fallen asleep in Christ have perished.  If for this life only we have hoped in Christ, we are the most pitiable people of all.

I Corinthians 15:12-19