There is one qualification the manager cannot acquire but must bring to the task. It is not genius; it is character.
Peter DruckerThe better a man is the more mistakes will he make – for the more new things he will try.
Peter DruckerThe paradox of the prophet: his very success is his failure. The prophet whose time has come no longer shocks; he entertains.
Peter DruckerThe great mystery isn't that people do things badly but that they occasionally do a few things well. The only thing that is universal is incompetence. Strength is always specific! Nobody ever commented, for example, that the great violinist Jascha Heifetz probably couldn't play the trumpet very well.
Peter Drucker