9 I wrote to the church about this, but Diotrephes, who loves to be the leader, refuses to have anything to do with us. 10 When I come, I will report some of the things he is doing and the evil accusations he is making against us. Not only does he refuse to welcome the traveling teachers, he also tells others not to help them. And when they do help, he puts them out of the church.
11 Dear friend, don't let this bad example influence you. Follow only what is good. Remember that those who do good prove that they are God's children, and those who do evil prove that they do not know God.
12 Everyone speaks highly of Demetrius, as does the truth itself. We ourselves can say the same for him, and you know we speak the truth.
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.