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 DruckerThe person who will make the greatest contribution to a company is the mature person-and you cannot have maturity if you have no life or interest outside the job.
Peter Drucker