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.
Some people like to live in a planned, orderly way and others prefer flexibility and spontaneity. Planners (or "Judgers" in Myers-Briggs terms) like to focus on a plan and stick with it, while perceivers are prone to focus on what's happening around them and adapt to it. Perceivers work from the outside in; they see things happening and work backward to understand the cause and how to respond; they also see many possibilities that they compare and choose from--often so many that they are confused by them. In contrast, planners work from the inside out, first figuring out what they want to achieve and then how things should unfold. Planners and perceivers have trouble appreciating each other. Perceivers see new things and change direction often. This is discomforting to planners, who weigh precedent much more heavily in their decision making, and assume if it was done in a certain way before, it should be done in the same way again. Similarly, planners can discomfort perceivers by being seemingly rigid and slow to adapt.