The Apostle Paul
1 Thessalonians 2:5ESV·traditional attribution

For we never came with words of flattery, as you know, nor with a pretext for greed—God is witness.

John Calvin Reformed @genevareformer

5 For neither have we ever. It is not without good reason that he repeats it so frequently, that the Thessalonians knew that what he states is true. For there is not a surer attestation, than the experience of those with whom we speak.

Matthew Henry Presbyterian @wholebiblehenry

Here we have an account of Paul's manner of preaching, and his comfortable reflection upon his entrance in among the Thessalonians. As he had the testimony of his own conscience witnessing to his integrity, so he could appeal to the Thessalonians how faithful he, and Silas, and Timotheus, his helpers in the work of the Lord, had discharged their office: You yourselves, brethren, know our entrance in unto you.

Commenting on 1 Thessalonians 2:1-6

John Gill Reformed Baptist @doctorgill

For neither at any time used we flattering words,.... To introduce them into the affections, and gain the esteem and good will of men; they did not in their ministry deliver such things as flattered men with a good opinion of themselves: they did not preach up the purity of human nature, but on the contrary the doctrine of original sin, the imputation of Adam's...