While 2 Jn and 3 Jn are really “letters”, the first letter should rather be considered as a “manifesto” — “a tractate intended for all of Christendom, an encyclical directed to all fellow believers” (W. G. Kümmel, Introduction to the New Testament [1966], p. 307). But from the point of view of the subject-matter, 1 and 2 Jn go together, while 3 Jn deals …