Therefore, my beloved brothers and sisters, be steadfast, immovable, always excelling in the work of the Lord because you know that in the Lord your labor is not in vain.
I went up in response to a revelation. Then I laid before them (though only in a private meeting with the acknowledged leaders) the gospel that I proclaim among the gentiles, in order to make sure that I was not running, or had not run, in vain.
For this reason, when I could bear it no longer, I sent to find out about your faith; I was afraid that somehow the tempter had tempted you and that our labor had been in vain.