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 we should all strive to see ourselves objectively, we shouldn't expect everyone to be able to do that well. We all have blind spots; people are by definition subjective. For this reason, it is everyone's responsibility to help others learn what is true about themselves by giving them honest feedback, holding them accountable, and working through disagreements in an open-minded way.