(Pro 22:14 KJV) The mouth of strange women is a deep pit: he that is abhorred of the LORD shall fall therein.
There is no end to the trouble our “mouth” (6310) can get us into, or, as it is presented here, the mouth of someone else. The immediate context is someone tempting us into sexual sin. The problem is bigger than that. It is true that Proverbs talks about the importance of counsel and advice but there is always the qualification that the advice is to come from people of wisdom. We are to strain carefully anything that comes from a popular guru.
I have many people who want to tell me how it is and how I should see it. I take the same risk when I write on the internet. Some I accept, some I reject. I hope that my basis of judgement is always based on the standards I have absorbed from the word of God and not just my feelings.
So? What will be your basis of decisions today? Keep in mind that another way of saying “word of mouth” is “gossip.” If you don’t know what the word says, you won’t know if the guru is right. If you know what the word says you probably don’t need to know what the guru said.