You Know Only Insofar As You Can

Large Increases In Cost With Questionable Increases In Performance Can Be Tolerated Only In Race Horses And Fancy Women.

I Often Say That When You Can Measure What You Are Speaking About, And Express It In Numbers, You Know Something About It; But When You Cannot Measure It, When You Cannot Express It In Numbers, Your Knowledge Is Of A Meagre And Unsatisfactory Kind.

Accurate And Minute Measurement Seems To The Non-scientific Imagination, A Less Lofty And Dignified Work Than Looking For Something New. But Nearly All The Grandest Discoveries Of Science Have Been But The Rewards Of Accurate Measurement And Patient Long-continued Labour In The Minute Sifting Of Numerical Results.

In Science There Is Only Physics; All The Rest Is Stamp Collecting.

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