2 John

Rejoice in others walking in the truth. “I rejoiced greatly that I found of thy children walking in truth, as we have received a commandment from the Father.” (2 Jn v. 4)

Beware those who deceive. “For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.” (2 Jn v. 7)

The only doctrine is the doctrine of Christ. “Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God. He that abideth in the doctrine of Christ, he hath both the Father and the Son.” (2 Jn v. 9)