1 Thessalonians 2:1
For you know yourselves, brothers, that our visit to you was by no means a failure.
1 Corinthians 15:2
and through which you are to be saved, unless your faith at first was spurious.
1 Corinthians 15:10
But by God's unmerited favor I have become what I am, and His unmerited favor shown to me was not bestowed for nothing, for I have toiled more extensively than any of them, and yet it was not I but God's unmerited favor working with me.
1 Corinthians 15:58
So, my dear brothers, continue to be firm, incapable of being moved, always letting the cup run over in the work of the Lord, because you know that your labor in the service of the Lord is never thrown away.
2 Corinthians 6:1
As God's fellow-worker I beg you too not to accept God's favor and throw it away.
Galatians 2:2
I went up under the guidance of a divine revelation. Now I laid before them the good news that I was in the habit of preaching among the heathen, but first I did so privately before the leaders, for fear that my course might be or might have been to no purpose.
Galatians 4:11
I am beginning to fear that I have bestowed my labors on you for nothing.
Philippians 2:16
to hold up the message of life. That will give me ground for boasting on the day of Christ, because neither my career nor my labor has been a failure.
1 Thessalonians 1:3-10
for we can never for a moment before our God forget your energizing faith, your toiling love, and your enduring hope in our Lord Jesus Christ.
1 Thessalonians 2:13
For another reason too, we, as far as we are concerned, are constantly giving thanks to God; that is, when you received the message you heard from us, you welcomed it not as the message of men but as the message of God, as it really is, which keeps on working in you who believe.
1 Thessalonians 3:5
That was why, when I could bear it no longer, I sent to learn about your faith, for I was afraid that the tempter had tempted you and our labor might be lost.
2 Thessalonians 1:10
when on that day He comes to be glorified in His consecrated ones and to be admired by all who believe in Him because our testimony has been confidently accepted among you.
2 Thessalonians 3:1
Finally, brothers, pray for us, that the message of the Lord may continue to spread and prove its glorious power as it did among you,