2 John 1:6-9

And love means living the way God commanded us to live. As you have heard from the beginning, his command is this: Live a life of love. Many false teachers are in the world now who do not confess that Jesus Christ came to earth as a human. Anyone who does not confess this is a false teacher and an enemy of Christ. Be careful yourselves that you do not lose everything you have worked for, but that you receive your full reward. Anyone who goes beyond Christ’s teaching and does not continue to follow only his teaching does not have God. But whoever continues to follow the teaching of Christ has both the Father and the Son.