Niels Bohr Archive: Quotations by Niels Bohr
..... if anybody says he can think about quantum theory without getting
giddy it merely shows that he hasn't understood the first thing about
... the old saying of the two kinds of truth. To the one kind
belongs statements so simple and clear that the opposite assertion
obviously could not be defended. The other kind, the so-called "deep truths",
are statements in which the opposite also contains deep truth.
... when searching for harmony in life one must never forget that in the
drama of existence we are ourselves both actors and spectators.
How wonderful that we have met with a paradox. Now we have some hope of
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.
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.
Contraria sunt complementa
(Opposites are complementary)