But I said, I have laboured in vain, I have spent my strength for nought and vanity: yet surely my judgement is with the LORD, and my recompence with my God.
Wherefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not vain in the Lord.
And I went up by revelation; and I laid before them the gospel which I preach among the Gentiles, but privately before them who were of repute, lest by any means I should be running, or had run, in vain.
For this cause I also, when I could no longer forbear, sent that I might know your faith, lest by any means the tempter had tempted you, and our labour should be in vain.