1 Thessalonians 2:3-5

3For the appeal we make does not spring from error or impure motives, nor are we trying to trick you. 4On the contrary, we speak as those approved by God to be entrusted with the gospel. We are not trying to please people but God, who tests our hearts. 5You know we never used flattery, nor did we put on a mask to cover up greed—God is our witness.