If You Can Not Measure It, You

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

Heavier-than-air Flying Machines Are Impossible.

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.

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.