13 But if there is no coming back from the dead, then Christ has not come back from the dead: 14 And if Christ did not come again from the dead, then our good news and your faith in it are of no effect. 15 Yes, and we are seen to be false witnesses of God; because we gave witness of God that by his power Christ came again from the dead: which is not true if there is no coming back from the dead. 16 For if it is not possible for the dead to come to life again, then Christ has not come to life again: 17 And if that is so, your faith is of no effect; you are still in your sins.
Matthew Henry's Commentary on 1 Corinthians 15:13-17
Commentary on 1 Corinthians 15:12-19
(Read 1 Corinthians 15:12-19)
Having shown that Christ was risen, the apostle answers those who said there would be no resurrection. There had been no justification, or salvation, if Christ had not risen. And must not faith in Christ be vain, and of no use, if he is still among the dead? The proof of the resurrection of the body is the resurrection of our Lord. Even those who died in the faith, had perished in their sins, if Christ had not risen. All who believe in Christ, have hope in him, as a Redeemer; hope for redemption and salvation by him; but if there is no resurrection, or future recompence, their hope in him can only be as to this life. And they must be in a worse condition than the rest of mankind, especially at the time, and under the circumstances, in which the apostles wrote; for then Christians were hated and persecuted by all men. But it is not so; they, of all men, enjoy solid comforts amidst all their difficulties and trials, even in the times of the sharpest persecution.