Bohr Quote by Emma Sadleir
““The Danish physicist and Nobel Prize winner Niels Bohr defined an expert as follows: ‘An expert is a man who has made all the mistakes which can be made.””
About This Quote
Source Speech: Lecture on Expertise, University of Copenhagen, 2015
Expertise emerges from learning through trial and error, not from avoiding mistakes.
In simple terms: Mistakes are essential to mastery.
Key Takeaway
Embrace errors as learning tools.
Themes
learning
expertise
mistakes
Mood
inspirational
analytical
Type
educational
motivational
When to use this quote
- training programs
- career development
- scientific research
- personal growth
Key Concepts
cognitive science
skill acquisition
Questions to Reflect On
- What mistakes have taught you the most?
- How can you balance risk and safety?
A Different Perspective
Overemphasis on mistakes can discourage risk‑taking.
![“Nobody knows how the stand of our knowledge about the atom would be without him. Personally, [Niels] Bohr is one of the amiable colleagues I have met. He utters his opinions like one perpetually groping and never like one who believes himself to be in possession of the truth.” quote by Albert Einstein](https://sms4smile.com/quotes/img-quotes/996/albert-einstein-33_amiable_nobody-knows-how-the-stand-of-our-knowle_2279599.jpg)
![“I did not like the man [Niels Bohr] when you showed him to me, with his hair all overhis head.” quote by Winston Churchill](https://sms4smile.com/quotes/img-quotes/959/winston-churchill-95_hair_i-did-not-like-the-man-niels-bohr-when-y_2095285.jpg)
![“When [Niels] Bohr is about everything is somehow different. Even the dullest gets a fit of brilliancy.” quote by Isidor Isaac Rabi](https://sms4smile.com/quotes/img-quotes/382/isidor-isaac-rabi-26285_bohr_when-niels-bohr-is-about-everything-is-s_2010182.jpg)
![“[About the great synthesis of atomic physics in the 1920s:] It was a heroic time. It was not the doing of any one man; it involved the collaboration of scores of scientists from many different lands. But from the first to last the deeply creative, subtle and critical spirit of Niels Bohr guided…” quote by J. Robert Oppenheimer](https://sms4smile.com/quotes/img-quotes/34e/j-robert-oppenheimer-6978_bohr_about-the-great-synthesis-of-atomic-phys_427709.jpg)
![“[On famous Nobel Laureate Niels Bohr] [Niels] Bohr's sort of humor, use of parables and stories, tolerance, dependence on family, feelings of indebtedness, obligation, and guilt, and his sense of responsibility for science, community, and, ultimately, humankind in general, are common traits of the…” quote by Finn Aaserud](https://sms4smile.com/quotes/img-quotes/fe8/finn-aaserud-237553_atheism_on-famous-nobel-laureate-niels-bohr-niel_2857237.jpg)
![“Planck...and Bohr...have invented systems containing electrons of which the motion produces no effect upon external charges...[N]ot only [is this] inconsistent with the accepted laws of electromagnetism, but I may add, is logically objectionable, for that state of motion which produces no physical…” quote by G.N.Lewis](https://sms4smile.com/quotes/img-quotes/363/g-n-lewis-101729_chemistry_planck-and-bohr-have-invented-systems-co_993371.jpg)
