John is writing to Gaius, a godly, generous, hospitable believer. John encouraged him to always allow truth to be the governor of his love and hospitality. He exhorted him to continue to be a fellow helper to the truth. There was an open issue in Gaius’ church family that needed to be addressed. There was a man who was arrogantly seeking to dominate the church. His name was Diotrephes. His spirit, attitude and actions were a real hindrance to both truth and love among God’s people. John is making Gaius aware of this man in this personal letter so as to help deal with the situation and continue doing what was pleasing to God.