There Is No Space Without

Observation And Theory Get On Best When They Are Mixed Together, Both Helping One Another In The Pursuit Of Truth. It Is A Good Rule Not To Put Overmuch Confidence In A Theory Until It Has Been Confirmed By Observation. I Hope I Shall Not Shock The Experimental Physicists Too Much If I Add That It Is Also A Good Rule Not To Put Overmuch Confidence In The Observational Results That Are Put Forward Until They Have Been Confirmed By Theory.

It Is A Primitive Form Of Thought That Things Exist Or Do Not Exist.

An Ocean Traveler Has Even More Vividly The Impression That The Ocean Is Made Of Waves Than That It Is Made Of Water.

The Helium Which We Handle Must Have Been Put Together At Some Time And Some Place. We Do Not Argue With The Critic Who Urges That The Stars Are Not Hot Enough For This Process; We Tell Him To Go And Find A Hotter Place.

We Have Found That Where Science Has Progressed The Farthest, The Mind Has But Regained From Nature That Which The Mind Has Put Into Nature. We Have Found A Strange Foot-print On The Shores Of The Unknown. We Have Devised Profound Theories, One After Another, To Account For Its Origin. At Last, We Have Succeeded In Reconstructing The Creature That Made The Foot-print. And Lo! It Is Our Own.