The letter focuses on truth, which we have from God, and ought to hold to. This truth includes in its compass adherence to the commands of the God who is truth, the chief of which is to love.
Outline
Introduction / Commendation of Truth (2Jn 1-3)
Truth Demands Obedience (2Jn 4-6)
Truth Will Not Associate With Deception (2Jn 7-11)
The Deception Regarding Christ's Manhood (2Jn 7-8)
The Deception of Exceeding Christ's Message (2Jn 9)