You can teach all sorts of things that improve the practice of management with people who are managers. What you cannot do is teach management to somebody who is not a manager, the way you cannot teach surgery to somebody whose not a surgeon.
Henry MintzbergCorporations are economic entities, to be sure, but they are also social institutions that must justify their existence by their overall contribution to society.
Henry MintzbergA leader has to be one of two things: he either has to be a brilliant visionary himself, a truly creative strategist, in which case he can do what he likes and get away with it; or else he has to be a true empowerer who can bring out the best in others.
Henry Mintzberg