and if Christ hath not been raised, your faith is vain; ye are yet in your sins.
And if Christ be not raised, your faith [is] vain; ye are yet in your sins. (7) First, seeing death is the punishment of sin, in vain should we believe that our sins were forgiven us, if they remain: but they do remain, if Christ did not rise from death. (e) They are yet in their sins who are not sanctified, nor have obtained remission of their sins.
You say there is no resurrection? Yet Christ has risen, an incontestable fact, proved by eyewitnesses and foretold in ancient prophecy. Deny the resurrection and you make the apostles false witnesses of God, make preaching vain, and overturn the principal evidence of Christianity itself.
AI summary
Commenting on 1 Corinthians 15:12-19
vain--Ye are, by the very fact (supposing the case to be as the skeptics maintained), frustrated of all which "your faith" appropriates: Ye are still under the everlasting condemnation of your sins (even in the disembodied state which is here referred to), from which Christ's resurrection is our justification (Rom 4:25): "saved by his life" (Rom 5:10).