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.
If you don't mind being wrong on the way to being right you'll learn a lot--and increase your effectiveness. But if you can't tolerate being wrong, you won't grow, you'll make yourself and everyone around you miserable, and your work environment will be marked by petty backbiting and malevolent barbs rather than by a healthy, honest search for truth.
You must not let your need to be right be more important than your need to find out what's true. Jeff Bezos described it well when he said, "You have to have a willingness to repeatedly fail. If you don't have a willingness to fail, you're going to have to be very careful not to invent."