What Is It Indeed That

Absolute Space, That Is To Say, The Mark To Which It Would Be Necessary To Refer The Earth To Know Whether It Really Moves, Has No Objective Existence.... The Two Propositions: "the Earth Turns Round" And "it Is More Convenient To Suppose The Earth Turns Round" Have The Same Meaning; There Is Nothing More In The One Than In The Other.

Einstein Does Not Remain Attached To The Classical Principles, And When Presented With A Problem In Physics He Quickly Envisages All Of Its Possibilities. This Leads Immediately In His Mind To The Prediction Of New Phenomena Which May One Day Be Verified By Experiment.

Zero Is The Number Of Objects That Satisfy A Condition That Is Never Satisfied. But As Never Means "in No Case", I Do Not See That Any Progress Has Been Made.

Mathematics Has A Threefold Purpose. It Must Provide An Instrument For The Study Of Nature. But This Is Not All: It Has A Philosophical Purpose, And, I Daresay, An Aesthetic Purpose.

There Are No Solved Problems; There Are Only Problems That Are More Or Less Solved.