2 John 1:6-9

This is love:  that we walk according to his commands.  This is the command as you have heard it from the beginning: that you walk in love.  Many deceivers have gone out into the world; they do not confess the coming of Jesus Christ in the flesh.  This is the deceiver and the antichrist.  Watch yourselves so that you don’t lose what we  have worked for, but that you may receive a full reward.  Anyone who does not remain in Christ’s teaching  but goes beyond it does not have God.  The one who remains  in that teaching, this one has both the Father  and the Son.