In my previous post I provided a summary of the main themes and emphases of 1 John; now I can turn to the question of Who, Why, and When.

They question of “who wrote it” has long been discussed, and almost always in relationship to the Gospel of John.  Neither book mentions the name John; neither identifies its author; and neither refers directly to the other.  Even so, as I pointed out in my discussion of John (see: https://ehrmanblog.org/the-gospel-of-john-who-wrote-it-when-and-why/ ), the Gospel was from early times said to have been written by John the son of Zebedee.  And since 1 John (along with 2 and 3 John) seemed so similar in many ways to the Gospel, it was assumed to have been written by him as well.  Hence the titles they received, as the Epistles of John.

Among the shared themes of the Gospel and Epistles of John are the following:

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