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A deep truth is a truth so deep that not only is it true but it’s exact opposite is also true.

Niels Bohr

If quantum mechanics hasn’t profoundly shocked you, you haven’t understood it yet.
NIELS BOHR

Science Understand Yourself
Prediction is very difficult, especially if it’s about the future.
NIELS BOHR

Difficult Future Time
It is a great pity that human beings cannot find all of their satisfaction in scientific contemplativeness.
NIELS BOHR

Greatness Human Satisfaction Science
The measurement we get when we measure something is not a property of the thing measured.
NIELS BOHR

Measure Property Science
Physics is the belief that a simple and consistent description of nature is possible.
NIELS BOHR

Belief Nature Possible Simplicity
One must always do what one really cannot.
NIELS BOHR

Inspirational Oneself
The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.
NIELS BOHR

Democracy Politics Secret Weapon
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 BOHR

Himself Human Value
How wonderful that we have met with a paradox. Now we have some hope of making progress.
NIELS BOHR

Hope Progress Thinking Wonderful
Every sentence I utter must be understood not as an affirmation, but as a question.
NIELS BOHR

Myself Science Understand
If you think you understand it, that only shows that you don’t know the first thing about it.
NIELS BOHR

Thinking Understand Yourself
The present state of atomic theory is characterized by the fact that we not only believe the existence of atoms to be proved beyond a doubt, but also we even believe that we have an intimate knowledge of the constituents of the individual atoms.
NIELS BOHR

Believe Beyond Character Doubt Knowledge Science Theory
We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct. My own feeling is that it is not crazy enough.
NIELS BOHR

Crazy Enough Feeling Theory
Address to Albert Einstein: You are not thinking. You are merely being logical.
NIELS BOHR

Logical Thinking Yourself
Opposites are not contradictory but complementary.
NIELS BOHR

Education Learning Science
Our task is not to penetrate the essence of things, the meaning of which we do not know anyway, but rather to develop concepts which allow us to talk in a productive way about phenomena in nature
NIELS BOHR

Development Nature Ourselves Talk

A deep truth is a truth so deep that not only is it true but it’s exact opposite is also true.

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A deep truth is a truth so deep that not only is it true but it’s exact opposite is also true.

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More Niels Bohr Quotes