3 John
This brief epistle is attributed to the apostle John, though he does not give his name. He called himself "the elder" which seems to have been John's self-designation in the final years of his ministry. The same stylistic and theological similarities apparent in the fourth gospel, 1 John and 2 John are a distinct feature of 2 John as well. The letter is addressed to Gaius, a common name that can not be identified as a specific person. John commends and exhorts Gaius for his steadfastness and for his care of Christian missionaries, and he uses Diotrephes as an example of how not to live as a Christian. John's words are meant to encourage Gaius until John can see him personally.