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.
Life is like a giant smorgasbord with more delicious alternatives than you can ever hope to taste. Choosing a goal often means rejecting some things you want in order to get other things that you want or need even more. Some people fail at this point, before they've even started. Afraid to reject a good alternative for a better one, they try to pursue too many goals at once, achieving few or none of them. Don't get discouraged and don't let yourself be paralyzed by all the choices. You can have much more than what you need to be happy. Make your choice and get on with it.