Related:

• The only thing worse than an expert is someone who thinks he's an expert.
• None of our men are "experts." We have most unfortunately found it necessary to get rid of a man as soon as he thinks himself an expert -- because no one ever considers himself expert if he really knows his job.
  A man who knows a job sees so much more to be done than he has done, that he is always pressing forward and never gives up an instant of thought to how good and how efficient he is....
• None of our men are "experts." We have most unfortunately found it necessary to get rid of a man as soon as he thinks himself an expert -- because no one ever considers himself expert if he really knows his job.
  A man who knows a job sees so much more to be done than he has done, that he is always pressing forward and never gives up an instant of thought to how good and how efficient he is....
• The expert is a person who avoids the small errors as he sweeps on to the grand fallacy.
• An economist is an expert who will know tomorrow why the things he predicted yesterday didn't happen today.
  -- Dr. Laurence J. Pete...
• An expert is a man who has made all the mistakes which can be made, in a narrow field.
  -- Niels Bohr (1885-1962)...
• An expert is a man who has made all the mistakes which can be made, in a very narrow field.
  -- Niels Boh...
• An expert doesn't know more than you do. He is merely better organized and has slides.
  -- Van Oech's Law...
• An expert is a person who avoids the small errors as he sweeps on to the grand fallacy.
  -- Benjamin Stolberg...