2 John 1:6-9

6And 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. 7For 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. 8Look to yourselves, that ye lose not the things which we have wrought, but that ye receive a full reward. 9Whosoever goeth onward and abideth not in the teaching of Christ, hath not God: he that abideth in the teaching, the same hath both the Father and the Son.