If You Can Not Measure It, You

I Need Scarcely Say That The Beginning And Maintenance Of Life On Earth Is Absolutely And Infinitely Beyond The Range Of All Sound Speculation In Dynamical Science. The Only Contribution Of Dynamics To Theoretical Biology Is Absolute Negation Of Automatic Commencement Or Automatic Maintenance Of Life.

In Physical Science A First Essential Step In The Direction Of Learning Any Subject Is To Find Principles Of Numerical Reckoning And Practicable Methods For Measuring Some Quality Connected With It. 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; It May Be The Beginning Of Knowledge, But You Have Scarcely In Your Thoughts Advanced To The Stage Of Science, Whatever The Matter May Be.

Suppose That You Could Mark The Molecules In A Glass Of Water; Then Pour The Contents Of The Glass Into The Ocean And Stir The Latter Throughly So As To Distribute The Marked Molecules Uniformly Throughout The Seven Seas; If Then You Took A Glass Of Water Anywhere Out Of The Ocean, You Would Find In It About A Hundred Of Your Marked Molecules.

If You Cannot Measure It, Then It Is Not Science.

When You Are Face To Face With A Difficulty, You Are Up Against A Discovery.