I rejoice greatly that I have found certain of thy children walking in truth, even as we received commandment from the Father.

And this is love, that we should walk after his commandments. This is the commandment, even as ye heard from the beginning, that ye should walk in it.

For many deceivers are gone forth into the world, even they that confess not that Jesus Christ cometh in the flesh. This is the deceiver and the antichrist.

If anyone comes to you but does not present his teachings, do not receive him into your house or even welcome him,