To Live Among Friends Is The Primary

To Measure Is To Know.

If We Can't Express What We Know In The Form Of Numbers, We Really Don't Know Much About It.

All Of Science Can Be Divided Into Physics And Stamp-collecting.

Fourier's Theorem Is Not Only One Of The Most Beautiful Results Of Modern Analysis, But It May Be Said To Furnish An Indispensable Instrument In The Treatment Of Nearly Every Recondite Question In Modern Physics.

I Can Never Satisfy Myself Until I Can Make A Mechanical Model Of A Thing. If I Can Make A Mechanical Model, I Can Understand It. As Long As I Cannot Make A Mechanical Model All The Way Through I Cannot Understand.