1 John 4:5They are of the world. Therefore they speak as of the world, and the world hears them. 6We are of God. He who knows God hears us; he who is not of God does not hear us. By this we know the spirit of truth and the spirit of error.
Romans 16:17Now I urge you, brethren, note those who cause divisions and offenses, contrary to the doctrine which you learned, and avoid them. 18For those who are such do not serve our Lord Jesus Christ, but their own belly, and by smooth words and flattering speech deceive the hearts of the simple.
1 John 3:7Little children, let no man deceive you: he that doeth righteousness is righteous, even as he is righteous. 8He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.
James 1:22But be doers of the word, and not hearers only, deceiving yourselves. 23For if anyone is a hearer of the word and not a doer, he is like a man observing his natural face in a mirror; 24for he observes himself, goes away, and immediately forgets what kind of man he was. 25But he who looks into the perfect law of liberty and continues in it, and is not a forgetful hearer but a doer of the work, this one will be blessed in what he does.