When a politician is in opposition he is an expert on the means to some end; and when he is in office he is an expert on the obstacles to it.
Gilbert Keith Chesterton
An expert is a person who has found out by his own painful experience all the mistakes that one can make in a very narrow field.
Niels Henrik David Bohr
If an expert says it can't be done, get another expert.
David Ben Gurion
An expert is a person who avoids small error as he sweeps on to the grand fallacy.
Benjamin Stolberg
The greatest danger to liberty today comes from the men who are most needed and most powerful in modern government, namely, the efficient expert administrators exclusively concerned with what they regard as the public good
Fredrich August von Hayek
If stock market experts were so expert, they would be buying stock, not selling advice.
Norman R. Augustine
An expert is someone who knows some of the worst mistakes, which can be made, in a very narrow field.
Niels Bohr
An expert is a person who avoids the small errors while sweeping on to the grand fallacy.
Steven Weinberg
My definition of an expert in any field is a person who knows enough about what\'s really going on to be scared.
P. J. Plauger
Make three correct guesses consecutively and you will establish a reputation as an expert.
Laurence J. Peter
Try, try, try, and keep on trying is the rule that must be followed to become an expert in anything.
W. Clement Stone