When they speak fair good sounding words, should we hear them.
Constantly causing division from the doctrine of the Lord, which is evidenced by the good words and fair speeches they keep vomiting out...
Romans 16:17 Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.
18 For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple.
19 For your obedience is come abroad unto all men. I am glad therefore on your behalf: but yet I would have you wise unto that which is good, and simple concerning evil.
Jeremiah 12:6 For even thy brethren, and the house of thy father, even they have dealt treacherously with thee; yea, they have called a multitude after thee: BELIEVE THEM NOT, though they speak fair words unto thee.
On top of not believing in their "fair" words, we are testified by God how seven abominations are in their heart ( well they do give their doctrine as a sinning one )
Proverbs 26:21 As coals are to burning coals, and wood to fire; so is a contentious man to kindle strife.
22 The words of a talebearer are as wounds, and they go down into the innermost parts of the belly.
23 Burning lips and a wicked heart are like a potsherd covered with silver dross.
24 He that hateth dissembleth with his lips, and layeth up deceit within him;
25 When he speaketh fair, BELIEVE HIM NOT: for there are seven abominations in his heart.
26 Whose hatred is covered by deceit, his wickedness shall be shewed before the whole congregation.
The Jews and Pharisees demand to know why they cannot believe, and Jesus tells them plainly, as they are not His sheep, because His sheep do not teach to be as wolves, but to be harmless as doves, to be as Christ..
John 10:24 Then came the Jews round about him, and said unto him, How long dost thou make us to doubt? If thou be the Christ, tell us plainly.
25 Jesus answered them, I told you, and ye believed not: the works that I do in my Father's name, they bear witness of me.
26 But ye believe not, because ye are not of my sheep, as I said unto you.
27 My sheep hear my voice, and I know them, and they follow me:
Hebrews 7:26 For such an high priest became us, who is holy, harmless, undefiled, separate from sinners, and made higher than the heavens;
Matthew 10:16 Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves.