Do Not Imagine That Mathematics Is Hard

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.

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.

Vortices Of Pure Energy Can Exist And, If My Theories Are Right, Can Compose The Bodily Form Of An Intelligent Species.

It Is Conceivable That Animal Life Might Have The Attribute Of Using The Heat Of Surrounding Matter, At Its Natural Temperature, As A Source Of Energy For Mechanical Effect . . . .the Influence Of Animal Or Vegetable Life On Matter Is Infinitely Beyond The Range Of Any Scientific Enquiry Hitherto Entered On. Its Power Of Directing The Motions Of Moving Particles, In The Demonstrated Daily Miracle Of Our Human Free-will, And In The Growth Of Generation After Generation Of Plants From A Single Seed, Are Infinitely Different From Any Possible Result Of The Fortuitous Concurrence Of Atoms.

If You Can Not Measure It, You Can Not Improve It.