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

which we also speak of, not in words dictated by human wisdom, but in those which are dictated by the holy Spirit; explaining spiritual things by spiritual words.

But in a public assembly I had rather speak five words to be understood, that I may instruct others also, than ten thousand words in an unknown tongue.

and again, "The Lord knoweth the thoughts of the wise, that they are vain."

By which also ye are saved, if ye retain it as I preached it to you: unless indeed ye have believed in vain.

But by the grace of God I am what I am: and his favor to me was not in vain; but I laboured more abundantly than they all; yet not I, but the grace of God that was with me.

and if Christ be not risen, your faith is vain; ye are yet in your sins.

Wherefore, my beloved brethren, be stedfast, unmoveable, always abounding in the work of the Lord, since ye know that your labor is not in vain in the Lord.