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.
People typically try to prove that they have the answer even when they don't. Why do they behave in this unproductive way? It's generally because they believe the senseless but common view that great people have all the answers and don't have any weaknesses. Not only does this view not square with reality, it stands in the way of their progress. People interested in making the best possible decisions are rarely confident that they have the best answers. They recognize that they have weaknesses and blind spots, and they always seek to learn more so that they can get around them.