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're looking for a visionary, pick a visionary to do the interview in which you probe for vision. If you are looking for a mix of qualities, assemble a group of interviewers who embody those qualities collectively. Don't choose interviewers whose judgment you don't trust (in other words, make sure they are believable).