9 I have written something to the church; but Diotrephes, who likes to put himself first, does not acknowledge our authority. 10 So if I come, I will call attention to what he is doing in spreading false charges against us. And not content with those charges, he refuses to welcome the friends, [1] and even prevents those who want to do so and expels them from the church.
11 Beloved, do not imitate what is evil but imitate what is good. Whoever does good is from God; whoever does evil has not seen God.
12 Everyone has testified favorably about Demetrius, and so has the truth itself. We also testify for him, [2] and you know that our testimony is true.
Matthew Henry's Commentary on 3 John 1:9-12
Commentary on 3 John 1:9-12
(Read 3 John 1:9-12)
Both the heart and mouth must be watched. The temper and spirit of Diotrephes was full of pride and ambition. It is bad not to do good ourselves; but it is worse to hinder those who would do good. Those cautions and counsels are most likely to be accepted, which are seasoned with love. Follow that which is good, for he that doeth good, as delighting therein, is born of God. Evil-workers vainly pretend or boast acquaintance with God. Let us not follow that which is proud, selfish, and of bad design, though the example may be given by persons of rank and power; but let us be followers of God, and walk in love, after the example of our Lord.