Book Note Matthew Henry Commentary (Consise)
** This epistle is addressed to a converted Gentile. The scope is to commend his stedfastness in the faith, and his hospitality, especially to the ministers of Christ. - The apostle commends Gaius for piety and hospitality. (1-8) Cautions him against siding with Diotrephes, who was a turbulent spirit; but recommends Demetrius as a man of excellent character. (9-12) He hopes soon to see Gaius. (13,14)