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.
As you get to know your people better, you will be better able to train and direct them. Most importantly, you will be able to assess their core values and abilities more accurately and make sure they complement yours. Don't rest with your initial evaluation, however. Always ask yourself if you would have hired them for that job knowing what you know now. If not, get them out of the job.