Quotations About
expertise

An expert is a man who has stopped thinking – he knows!

Unsourced

An expert is a man who has made all the mistakes, which can be made, in a very narrow field.

Posted in: Niels Bohr

A superior pilot uses his superior judgment to avoid situations which require the use of his superior skill.

Flying Lessons, Federal Aviation Administration, January 8, 2008
Posted in: Frank Borman