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In Our Description Of Nature The Purpose Is Not To Disclose The Real Essence Of The Phenomena But Only To Track Down, So Far As It Is Possible, Relations Between The Manifold Aspects Of Our Experience.

-Niels Bohr

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In Our Description Of

Niels Bohr

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In Our Description Of Nature The Purpose Is Not To Disclose The Real Essence Of The Phenomena But Only To Track Down, So Far As It Is Possible, Relations Between The Manifold Aspects Of Our Experience.

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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

One Thought Spectra Are Marvellous, But It Is Not Possible To Make Progress There. Just As If You Have The Wing Of A Butterfly Then Certainly It Is Very Regular With The Colors And So On, But Nobody Thought One Could Get The Basis Of Biology From The Coloring Of The Wing Of A Butterfly.

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An Independant Reality In The Ordinary Physical Sense Can Neither Be Ascribed To The Phenomenon Nor To The Agencies Of Observation.

There Are Some Things So Serious You Have To Laugh At Them.

If You Think You Understand It, That Only Shows That You Don't Know The First Thing About It.

There Are Two Sorts Of Truth: Trivialities, Where Opposites Are Clearly Absurd, And Profound Truths, Recognised By The Fact That The Opposite Is Also A Profound Truth

Anyone Not Shocked By Quantum Mechanics Has Not Yet Understood It.

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 Therefore Objective In The Sense That It Can Be Unambiguously Communicated In Ordinary Human Language.

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.

All Rising Curves That Show Unwelcome Trends In Human Affairs Will Approach Infinity If Extended Far Enough, But It Is We Who Dictate The Curve And Not Vice Versa.

The Meaning Of Life Consists In The Fact That It Makes No Sense To Say That Life Has No Meaning.

Meaning Of Life

Life Has No Meaning

It Is Not Enough To Be Wrong, One Must Also Be Polite.

Anyone Who Can Contemplate Quantum Mechanics Without Getting Dizzy Hasn't Understood It.

Some Subjects Are So Serious That One Can Only Joke About Them.

A Deep Truth Is A Truth So Deep That Not Only Is It True But It's Exact Opposite Is Also True.

Some Things Are So Serious, They Can Only Be Joked About.

Physics Is The Belief That A Simple And Consistent Description Of Nature Is Possible.

Predictions Are Hard, Especially Abot The Future.

There Are Trivial Truths And The Great Truths. The Opposite Of A Trivial Truth Is Plainly False. The Opposite Of A Great Truth Is Also True.

We Are Trapped By Language To Such A Degree That Every Attempt To Formulate Insight Is A Play On Words.

Of Course I Don't Believe In It [pointing To Horseshoe On His Office Wall]. But I Understand That It Brings You Luck Whether You Believe In It Or Not.

It Is The Hallmark Of Any Deep Truth That Its Negation Is Also A Deep Truth.

Technology Has Advanced More In The Last Thirty Years Than In The Previous Two Thousand. The Exponential Increase In Advancement Will Only Continue. Anthropological Commentary The Opposite Of A Trivial Truth Is False; The Opposite Of A Great Truth Is Also True.

You Must Come To Copenhagen To Work With Us. We Like People Who Can Actually Perform Thought Experiments!

Accuracy And Clarity Of Statement Are Mutually Exclusive.

We All Know Your Idea Is Crazy. The Question Is Whether It Is Crazy Enough.

It Is A Great Pity That Human Beings Cannot Find All Of Their Satisfaction In Scientific Contemplativeness.

The Great Extension Of Our Experience In Recent Years Has Brought Light To The Insufficiency Of Our Simple Mechanical Conceptions And, As A Consequence, Has Shaken The Foundation On Which The Customary Interpretation Of Observation Was Based.

If An Idea Does Not Appear Bizarre, There Is No Hope For It.

The Measurement We Get When We Measure Something Is Not A Property Of The Thing Measured.

Everything We Call Real Is Made Of Things That Cannot Be Regarded As Real.

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The Very Nature Of The Quantum Theory ... Forces Us To Regard The Space-time Coordination And The Claim Of Causality, The Union Of Which Characterizes The Classical Theories, As Complementary But Exclusive Features Of The Description, Symbolizing The Idealization Of Observation And Description, Respectively.

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Those Who Are Not Shocked When They First Come Across Quantum Theory Cannot Possibly Have Understood It.

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If Quantum Mechanics Hasn't Profoundly Shocked You, You Haven't Understood It Yet.

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A Person Who Wasn't Outraged On First Hearing About Quantum Theory Didn't Understand What Had Been Said.

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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.

Prediction Is Difficult, Especially The Future.

We Depend On Our Words... Our Task Is To Communicate Experience And Ideas To Others. We Must Strive Continually To Extend The Scope Of Our Description, But In Such A Way That Our Messages Do Not Thereby Lose Their Objective Or Unambiguous Character... We Are Suspended In Language In Such A Way That We Cannot Say What Is Up And What Is Down. The Word "reality" Is Also A Word, A Word Which We Must Learn To Use Correctly.

How Wonderful That We Have Met With A Paradox. Now We Have Some Hope Of Making Progress.

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No, No, You're Not Thinking; You're Just Being Logical.

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Sometimes The Child In One Behaves A Certain Way And The Rest Of Oneself Follows Behind, Slowly Shaking Its Head.

Opposites Are Not Contradictory But Complementary.

If Anybody Says He Can Think About Quantum Physics Without Getting Giddy, That Only Shows He Has Not Understood The First Thing About Them.

A Physicist Is Just An Atom's Way Of Looking At Itself.

One Must Always Do What One Really Cannot.

Oh What Idiots We Have All Been, This Is Just As It Must Be

Your Theory Is Crazy, But It's Not Crazy Enough To Be True.

If We Couldn't Laugh At Ourselves, That Would Be The End Of Everything.

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.

A Visitor To Niels Bohr's Country Cottage, Noticing A Horseshoe Hanging On The Wall, Teasing The Eminent Scientist About This Ancient Superstition. "can It Be True That You, Of All People, Believe It Will Bring You Luck?' 'of Course Not,' Replied Bohr, 'but I Understand It Brings You Luck Whether You Believe It Or Not.'

Nothing Exists Until It Is Measured.

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.

It Is, Indeed, Perhaps The Greatest Prospect Of Humanistic Studies To Contribute Through An Increasing Knowledge Of The History Of Cultural Development To That Gradual Removal Of Prejudices Which Is The Common Aim Of All Science.

The Opposite Of Every Great Idea Is Another Great Idea.

Every Sentence I Utter Must Be Understood Not As An Affirmation, But As A Question.

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Address To Albert Einstein: You Are Not Thinking. You Are Merely Being Logical.

Isolated Material Particles Are Abstractions, Their Properties Being Definable And Observable Only Through Their Interaction With Other Systems .

Interaction With Others

An Expert Is A Man Who Has Made All The Mistakes Which Can Be Made, In A Narrow Field.

It Is Difficult To Predict, Especially The Future.

In The Great Drama Of Existence We Are Audience And Actors At The Same Time.

Every Great And Deep Difficulty Bears In Itself Its Own Solution. It Forces Us To Change Our Thinking In Order To Find It.

It Is Wrong To Think That The Task Of Physics Is To Find Out How Nature Is. Physics Concerns What We Say About Nature.

Theoretical Physics

If You Aren't Confused By Quantum Mechanics, You Haven't Really Understood It.

Truth Is Something That We Can Attempt To Doubt, And Then Perhaps, After Much Exertion, Discover That Part Of The Doubt Is Not Justified.

And Anyone Who Thinks They Can Talk About Quantum Theory Without Feeling Dizzy Hasn't Yet Understood The First Thing About It.

Never Express Yourself More Clearly Than You Are Able To Think.

When We Measure Something We Are Forcing An Undetermined, Undefined World To Assume An Experimental Value. We Are Not Measuring The World, We Are Creating It.

When It Comes To Atoms, Language Can Be Used Only As In Poetry.

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