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.
Apparently, if you throw a frog into a pot of boiling water it will jump out immediately, but if you put it in room-temperature water and gradually bring it to a boil, it will stay in the pot until it dies. Whether or not that's true of frogs, I see something similar happen to managers all the time. People have a strong tendency to slowly get used to unacceptable things that would shock them if they saw them with fresh eyes.