Niels Henrik David Bohr Quotes

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

Niels Henrik David Bohr

Truth and clarity are complementary.

Niels Henrik David Bohr

Some subjects are so serious that one can only joke about them.

Niels Henrik David Bohr

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

Niels Henrik David Bohr

Every sentence I utter must be understood not as an affirmation, but as a question.

Niels Henrik David Bohr

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

Niels Henrik David Bohr

Every valuable human being must be a radical and a rebel, for what he must aim at is to make things better than they are.

Niels Henrik David Bohr

We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough to have a chance of being correct.

Niels Henrik David Bohr

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

Oh, what idiots we all have been. This is just as it must be.

Niels Henrik David Bohr

It is not enough to be wrong, one must also be polite.

Niels Henrik David Bohr

It is a great pity that human beings cannot find all of their satisfaction in scientific contemplativeness.

Niels Henrik David Bohr

There is no quantum world. There is only an abstract physical description. 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...

Niels Henrik David Bohr

Physics is to be regarded not so much as the study of something a priori given, but rather as the development of methods of ordering and surveying human experience. In this respect our task must be to account for such experience in a manner independent of individual subjective judgement and therefor objective in the sense that it can be unambiguously communicated in ordinary human language.

Niels Henrik David Bohr

Your theory is crazy, but it's not crazy enough to be true.

Niels Henrik David Bohr

Isolated material particles are abstractions, their properties being definable and observable only through their interaction with other systems.

Niels Henrik David Bohr
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