John the Apostle
3 John 1:10ESV·traditional attribution

So if I come, I will bring up what he is doing, talking wicked nonsense against us. And not content with that, he refuses to welcome the brothers, and also stops those who want to and puts them out of the church.

Matthew Henry Presbyterian

I. Diotrephes, unlike Gaius, loved preeminence and refused apostolic authority, spreading malicious words. He did not accept John’s letter and discouraged others from showing hospitality, casting them out of the church. John warns that he will address this behavior when he visits. II.

Commenting on 3 John 1:9-11

John Gill Reformed Baptist

Wherefore, if I come,.... Where both Gaius and Diotrephes lived, as he trusted he should shortly, Jo3 1:14; I will remember his deeds which he doth; meaning, not only that he would tell him of them to his face, but make mention of them, and expose them to the whole church, and reprove him for them: and which are as follow, prating against us with...

Albert Barnes Presbyterian

Verse 10. Wherefore, if I come. He was evidently expecting soon to make a visit to Gaius, and to the church, . I will remember his deeds which he doeth. That is, he would punish his arrogance and presumption; would take measures that he should be dealt with in a proper manner.