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 DruckerAs soon as you move one step up from the bottom, your effectiveness depends on your ability to reach others through the spoken and written word.
Peter DruckerNo business can do everything. Even if it has the money, it will never have enough good people. It has to set priorities. The worst thing to do is a little bit of everything. This makes sure that nothing is being accomplished. It is better to pick the wrong priority than none at all.
Peter Drucker