The 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 DruckerI no longer think that learning how to manage people, especially subordinates, is the most important for executives to learn. I am teaching above all else, how to manage oneself.
Peter Drucker