The Apostle Paul
2 Corinthians 3:3BSB·traditional attribution

It is clear that you are a letter from Christ, the result of our ministry, written not with ink but with the Spirit of the living God, not on tablets of stone but on tablets of human hearts.

John Calvin Reformed @genevareformer

3. Ye are the Epistle of Christ Pursuing the metaphor, he says that the Epistle of which he speaks was written by Christ, inasmuch as the faith of the Corinthians was his work. He says that it was ministered by him, as if meaning by this, that he had been in the place of ink and pen.

Matthew Henry Presbyterian @wholebiblehenry

In these verses, I. The apostle makes an apology for seeming to commend himself. He thought it convenient to protest his sincerity to them, because there were some at Corinth who endeavoured to blast his reputation; yet he was not desirous of vain-glory. And he tells them, 1.

Commenting on 2 Corinthians 3:1-5

John Gill Reformed Baptist @doctorgill

Forasmuch as ye are manifestly declared,.... But lest it should be thought that the apostle attributed too much to himself, by saying that the Corinthians were our epistle; here he says, they were "manifestly declared" to be the epistle of Christ ministered by us; so that the apostles and ministers of the word were only amanuenses, Christ was the author and dictator; yea, he himself...