A Postcard Warning About Who Not to Host

2 John is one of the shortest books in the entire Bible, a single sheet of papyrus's worth of writing addressed to "the elect lady and her children," a phrase most scholars read as a coded or affectionate way of addressing a particular local church and its members rather than an individual woman, though the personal reading has always had defenders too. Its content compresses the concerns of 1 John into a brief compass: a call to love one another according to the command "heard from the beginning," and a sharp warning against "deceivers" who deny that Jesus Christ came in the flesh, the same docetic teaching 1 John opposes at greater length.

The letter's most striking instruction concerns hospitality, ordinarily a prized Christian virtue in the ancient world, given how dependent traveling teachers and missionaries were on local welcome: here the Elder instructs the church not to receive such false teachers into their homes or even to greet them, since doing so would make the household "a partner in their evil deeds." The letter ends abruptly, the author noting he has much more to say but prefers to say it in person rather than "with paper and ink," a domestic detail that, alongside its brevity, has led many scholars to treat it as genuine, occasional correspondence rather than a crafted theological treatise.