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 MintzbergAn unsuccessful manager blames failure on his obligations; the effective manager turns them to his own advantage. A speech is a chance to lobby...a visit to an important customer a chance to extract trade information.
Henry MintzbergOrganizations should be built and managers should be functioning so people can be naturally empowered. If someone's doing their job, if someone's working in one of your warehouses, say, they should know their job better than anybody. They don't need to be 'empowered,' but encouraged and left alone to be able to do what they know best.
Henry Mintzberg