A Theory With Mathematical Beauty Is More

I Do Not See How A Man Can Work On The Frontiers Of Physics And Write Poetry At The Same Time. They Are In Opposition. In Science You Want To Say Something That Nobody Knew Before, In Words Which Everyone Can Understand. In Poetry You Are Bound To Say ... Something That Everyone Knows Already In Words That Nobody Can Understand. Commenting To Him About The Poetry J. Robert Oppenheimer Wrote.

Renormalization Is Just A Stop-gap Procedure. There Must Be Some Fundamental Change In Our Ideas, Probably A Change Just As Fundamental As The Passage From Bohr's Orbit Theory To Quantum Mechanics. When You Get A Number Turning Out To Be Infinite Which Ought To Be Finite, You Should Admit That There Is Something Wrong With Your Equations, And Not Hope That You Can Get A Good Theory Just By Doctoring Up That Number.

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.

I Consider That I Understand An Equation When I Can Predict The Properties Of Its Solutions, Without Actually Solving It.

It Is More Important To Have Beauty In One's Equations Than To Have Them Fit Experiment.