I Think It Is A Peculiarity Of

The Research Worker, In His Efforts To Express The Fundamental Laws Of Nature In Mathematical Form, Should Strive Mainly For Mathematical Beauty. He Should Take Simplicity Into Consideration In A Subordinate Way To Beauty ... It Often Happens That The Requirements Of Simplicity And Beauty Are The Same, But Where They Clash, The Latter Must Take Precedence.

Quantum Mechanics Has Explained All Of Chemistry And Most Of Physics.

It Is Quite Clear That Beauty Does Depend On One's Culture And Upbringing For Certain Kinds Of Beauty, Pictures, Literature, Poetry And So On...but Mathematical Beauty Is Of A Rather Different Kind. I Should Say Perhaps It Is Of A Completely Different Kind And Transcends These Personal Factors. It Is The Same In All Countries And At All Periods Of Time.

Just By Studying Mathematics We Can Hope To Make A Guess At The Kind Of Mathematics That Will Come Into The Physics Of The Future... If Someone Can Hit On The Right Lines Along Which To Make This Development, It May Lead To A Future Advance In Which People Will First Discover The Equations And Then, After Examining Them, Gradually Learn How To Apply Them... My Own Belief Is That This Is A More Likely Line Of Progress Than Trying To Guess At Physical Pictures.

Well, In The First Place, It Leads To Great Anxiety As To Whether It's Going To Be Correct Or Not ... I Expect That's The Dominating Feeling. It Gets To Be Rather A Fever... At Age 60, When Asked About His Feelings On Discovering The Dirac Equation.