3 John 1:12

Demetrius hath good report - Perhaps another member of the Church where Caius was; or he might have been one of those whom the apostle recommends to Caius; or, possibly, the bearer of this letter from John to Caius. He seems to have been an excellent person: all testified of his righteousness; the truth - Christianity, itself bore testimony to him; and the apostles themselves added theirs also.