I have never forgotten the message in the second letter of John, primarily because it is the most explicit scripture we have concerning people who bring a false message, and people who want to argue.  If you are afraid it might be rude to ask them to leave, remember that the apostle John said that this was the way to deal with these people.  Ask them to leave.  Don't receive them.

John ends both his second and third letters by discussing ink and paper verses face to face meetings.

II John 1: 12a  "Having many things to write unto you, I would not write with paper and ink; but I trust to come to you, and speak face to face…"

III John 1: 13-14a, John also ends this third short letter by saying, "I had many things to write, but I will not with ink and pen write to you:  But I trust I shall shortly see you, and we shall speak face to face."

The two ways the early Christians had to communicate were in letters and face to face.  In the next letter that follows the three epistles of John, Jude begins his letter the same way John ended his.  By speaking of his written words.

Jude is also a one chapter book.  It has twenty five verses.

Jude's main subject is about how to tell a false prophet from a true prophet.  We'll go through the verses of this letter and get the answer to that question.

Both of these men--John and Jude--were very concerned that the early converts knew the truth and were able to tell when someone was not honest about the message of Jesus.