Charles Spurgeon Commentary 1 Corinthians 15:14

"and if Christ hath not been raised, then is our preaching vain, your faith also is vain." — 1 Corinthians 15:14 (ASV)

And if Christ be not risen, then is our preaching vain, and your faith is also vain.

This truth is the keystone of the arch; put this away, and the whole tumbles down. It is upon this that the whole Christian system rests. If the resurrection of Christ is a mere myth, and not a positive matter of fact, preaching and faith are equally vain.