If You Think You Understand It, That

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.'

Prediction Is Difficult, Especially The Future.

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.

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.

Accuracy And Clarity Of Statement Are Mutually Exclusive.