An expert is a person who has made all the mistakes that can be made in a very narrow field.
The American Institute of Physics credits the photo [1] to AB Lagrelius & Westphal, which is the Swedish company used by the Nobel Foundation for most photos of its book series Les Prix Nobel.. Public domain · Wikimedia Commons
Niels Bohr
Danish physicist who proposed the Bohr model of the atom and helped found quantum mechanics. Nobel Prize in Physics, 1922; lived 1885–1962.
2 quotes
Every great and deep difficulty bears in itself its own solution.