1 Thessalonians 2:1-4

For yourselves, brethren, know our entering in unto you, that it hath not been found vain: but having suffered before and been shamefully treated, as ye know, at Philippi, we waxed bold in our God to speak unto you the gospel of God in much conflict. For our exhortation is not of error, nor of uncleanness, nor in guile: but even as we have been approved of God to be intrusted with the gospel, so we speak; not as pleasing men, but God who proveth our hearts.