Thematic Bible: Certainty of, proved by the resurrection of Christ

Now if Christ is preached as raised up from the dead, how do some among you say that [there] is no resurrection of the dead? But if [there] is no resurrection of the dead, Christ has not been raised [either]. But if Christ has not been raised, then our preaching [is] in vain, and your faith [is] in vain. read more.
And also we are found [to be] false witnesses of God, because we testified against God that he raised Christ, whom he did not raise if after all, then, the dead are not raised. For if the dead are not raised, Christ has not been raised [either]. But if Christ has not been raised, your faith [is] empty; you are still in your sins. And as a further result, those who have fallen asleep in Christ have perished. If {we have put our hope} in Christ in this life only, we are of all people most pitiable. But now Christ has been raised from the dead, the first fruits of those who have fallen asleep.