First John was addressed to all Christians, most of them in the seven churches of Revelation to whom John would have had close fellowship. Second John was addressed to an unnamed lady, which was in actuality one of the seven churches, probably the church at Ephesus. Third John is addressed to Gaius, a beloved brother in one of the churches, again, probably the church at Ephesus. It is obvious that Gaius was a dear friend of John and it appears that he was later appointed to pastor the church of Pergamum. John instructed the saints to "love one another" in his first and second letters. In this third epistle, he demonstrated in the person of Gaius how this was to be accomplished.