A Physical Law Must Possess Mathematical Beauty.

Theoretical Physicists Accept The Need For Mathematical Beauty As An Act Of Faith... For Example, The Main Reason Why The Theory Of Relativity Is So Universally Accepted Is Its Mathematical Beauty.

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.

There Is In My Opinion A Great Similarity Between The Problems Provided By The Mysterious Behavior Of The Atom And Those Provided By The Present Economic Paradoxes Confronting The World.

A Great Deal Of My Work Is Just Playing With Equations And Seeing What They Give.

The Physicist, In His Study Of Natural Phenomena, Has Two Methods Of Making Progress: (1) The Method Of Experiment And Observation, And (2) The Method Of Mathematical Reasoning. The Former Is Just The Collection Of Selected Data; The Latter Enables One To Infer Results About Experiments That Have Not Been Performed. There Is No Logical Reason Why The Second Method Should Be Possible At All, But One Has Found In Practice That It Does Work And Meets With Reasonable Success.