The Physical World Is Entirely Abstract And

But It Is Necessary To Insist More Strongly Than Usual That What I Am Putting Before You Is A Model-the Bohr Model Atom-because Later I Shall Take You To A Profounder Level Of Representation In Which The Electron Instead Of Being Confined To A Particular Locality Is Distributed In A Sort Of Probability Haze All Over The Atom.

A Hundred Thousand Million Stars Make One Galaxy; A Hundred Thousand Million Galaxies Make One Universe. The Figures May Not Be Very Trustworthy, But I Think They Give A Correct Impression.

It Is Also A Good Rule Not To Put Overmuch Confidence In The Observational Results That Are Put Forward Until They Are Confirmed By Theory.

If Someone Points Out To You That Your Pet Theory Of The Universe Is In Disagreement With Maxwell's Equations - Then So Much The Worse For Maxwell's Equations. If It Is Found To Be Contradicted By Observation - Well, These Experimentalists Do Bungle Things Sometimes. But If Your Theory Is Found To Be Against The Second Law Of Thermodynamics I Can Give You No Hope; There Is Nothing For It But To Collapse In Deepest Humiliation.

So Far As Physics Is Concerned, Time's Arrow Is A Property Of Entropy Alone.