It is commonly believed that innovations create changes - but few ever do. Successful innovations exploit changes that have already happened.
Peter DruckerInformation is the manager's main tool, indeed the manager's capital, and it is he who must decide what information he needs and how to use it.
Peter DruckerCharisma becomes the undoing of leaders. It makes them inflexible, convinced of their own infallibility, unable to change
Peter Drucker