Niels Bohr

Atomic model

Modern influential 107 sayings

Sayings by Niels Bohr

Anyone who is not shocked by quantum theory has not understood it.

Approx. 1920s-1930s — Attributed, often quoted by colleagues like Werner Heisenberg
Strange & Unusual Unverifiable

Never express yourself more clearly than you are able to think.

Unknown — Attributed by his son Hans Bohr in 'My Father'
Strange & Unusual Confirmed

How wonderful that we have met with a paradox. Now we have some hope of making progress.

Approx. 1920s-1930s — Attributed, often said during discussions in his institute
Strange & Unusual Confirmed

The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.

1955 (essay written) — Essays 1958-1962 on Atomic Physics and Human Knowledge
Strange & Unusual Confirmed

There are some things so serious that you have to laugh at them.

Unknown — Attributed by Abraham Pais in 'Niels Bohr's Times'
Strange & Unusual Confirmed

Physics is not about how the world is, it is about what we can say about the world.

Approx. 1930s — Attributed, a core idea of his Copenhagen interpretation
Strange & Unusual Unverifiable

It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we can say about nature.

1962 — Interview with Aage Petersen
Strange & Unusual Confirmed

We are all agreed that the only way of getting a correct impression of the world is to be a part of it.

Unknown — Unknown, widely attributed
Strange & Unusual Unverifiable

The great thing is to be able to make a mistake without knowing it.

Unknown — Attributed by friends and colleagues, reflecting his iterative approach to science.
Strange & Unusual Unverifiable

No, no, you're not thinking; you're just being logical.

Approx. 1920s-1930s — Attributed to Bohr by physicists like Victor Weisskopf, used during discussions on quantum mechanics…
Strange & Unusual Confirmed

An expert is a person who has made all the mistakes that can be made in a very narrow field.

Unknown — Unknown, widely attributed
Strange & Unusual Confirmed

It is not the job of science to tell us how the world is, but what we can say about it.

Approx. 1930s — Similar to his 'Physics is not about how the world is' quote, reflecting his philosophical stance.
Strange & Unusual Unverifiable

We are trapped by language to such a degree that every attempt to make progress in our understanding of the universe must also be an attempt to perfect our language.

Unknown — Attributed in 'Niels Bohr: A Centenary Volume'
Strange & Unusual Unverifiable

What is it that we human beings ultimately depend on? We depend on our words. We are suspended in language. Our task is to communicate experience and ideas to others.

1954 — Address to the Royal Danish Academy of Sciences and Letters
Strange & Unusual Unverifiable

The very nature of our subject, quantum physics, forces us to realize that we are suspended in language.

Approx. 1950s — Similar to previous quote, often paraphrased in discussions of quantum philosophy.
Strange & Unusual Unverifiable

When it comes to atoms, language can be used only as in poetry. The poet, too, is not nearly so concerned with describing facts as with creating images and establishing mental connections.

Unknown — Attributed by his son Hans Bohr in 'My Father'
Strange & Unusual Unverifiable

The fact that religions can exist, says that there is something in the human mind which is not satisfied by physics.

Unknown — Attributed by Abraham Pais in 'Niels Bohr's Times'
Strange & Unusual Unverifiable

Atomic physics has taught us that we cannot be observers without at the same time being participants.

1955 (essay written) — Essays 1958-1962 on Atomic Physics and Human Knowledge
Strange & Unusual Unverifiable

We are here in a position to be able to understand that the human spirit cannot be completely satisfied by science alone.

Unknown — Unknown, widely attributed
Strange & Unusual Unverifiable

The electron is not a 'thing' in the usual sense of the word. It is a system of relationships.

Approx. 1920s-1930s — Attributed, reflecting his view of quantum entities
Strange & Unusual Unverifiable