I Learnt To Distrust All Physical Concepts

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

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... It Seems That If One Is Working From The Point Of View Of Getting Beauty In One's Equations, And If One Has Really A Sound Insight, One Is On A Sure Line Of Progress. If There Is Not Complete Agreement Between The Results Of One's Work And Experiment, One Should Not Allow Oneself To Be Too Discouraged, Because The Discrepancy May Well Be Due To Minor Features That Are Not Properly Taken Into Account And That Will Get Cleared Up With Further Developments Of The Theory.

The Fundamental Laws Necessary For The Mathematical Treatment Of A Large Part Of Physics And The Whole Of Chemistry Are Thus Completely Known, And The Difficulty Lies Only In The Fact That Application Of These Laws Leads To Equations That Are Too Complex To Be Solved.

If You Are Receptive And Humble, Mathematics Will Lead You By The Hand. Again And Again, When I Have Been At A Loss How To Proceed, I Have Just Had To Wait Until I Have Felt The Mathematics Led Me By The Hand. It Has Led Me Along An Unexpected Path, A Path Where New Vistas Open Up, A Path Leading To New Territory, Where One Can Set Up A Base Of Operations, From Which One Can Survey The Surroundings And Plan Future Progress.