The Apostle Paul
2 Corinthians 1:18ESV·traditional attribution

As surely as God is faithful, our word to you has not been Yes and No.

John Calvin Reformed @genevareformer

18. God is faithful. By the term word he means doctrine, as is manifest from the reason that he adds, when he says, that the Son of God, who is preached by him, is not variable, etc. As to his being always consistent with himself in point of doctrine, and not differing from himself, “N’a point dit l’vn, puis l’autre;” — “Does not say one...

Matthew Henry Presbyterian @wholebiblehenry

The apostle here vindicates himself from the imputation of levity and inconstancy, in that he did not hold his purpose of coming to them at Corinth. His adversaries there sought all occasions to blemish his character, and reflect upon his conduct; and, it seemed, they took hold of this handle to reproach his person and discredit his ministry. Now, for his justification, I.

Commenting on 2 Corinthians 1:15-24

John Gill Reformed Baptist @doctorgill

But as God is true,.... It seems that the false apostles had insinuated, that as the apostle had not kept his word in coming to them as he had promised, that he was not to be depended upon in his ministry; that he might as well contradict himself, and deceive others in the one, as well as in the other: wherefore he appeals to God...