Principles are ways of successfully dealing with reality to get what you want out of life.
Ray Dalio, one of the world’s most successful investors and entrepreneurs, cites principles as his key to success.
While it pays to be open-minded, you also have to be discerning. Remember that the quality of the life you get will depend largely on the quality of the decisions that you make as you pursue your goals. The best way to make great decisions is to know how to triangulate with other, more knowledgeable people. So be discerning about whom you triangulate with and skilled in the way you do it.
The dilemma you face is trying to understand as accurately as you can what's true in order to make decisions effectively while realizing many of the opinions you will hear won't be worth much, including your own. Think about people's believability, which is a function of their capabilities and their willingness to say what they think. Keep their track records in mind.