Mathematics May Be Defined As The Economy

Without Renouncing The Support Of Physics, It Is Possible For The Physiology Of The Senses, Not Only To Pursue Its Own Course Of Development, But Also To Afford To Physical Science Itself Powerful Assistance.

Thought Experiment Is In Any Case A Necessary Precondition For Physical Experiment. Every Experimenter And Inventor Must Have The Planned Arrangement In His Head Before Translating It Into Fact.

It Would Not Become Physical Science To See In Its Self Created, Changeable, Economical Tools, Molecules And Atoms, Realities Behind Phenomena... The Atom Must Remain A Tool For Representing Phenomena.

What Mach Calls A Thought Experiment Is Of Course Not An Experiment At All. At Bottom It Is A Grammatical Investigation.

When I Recall Today My Early Youth, I Should Take The Boy That I Then Was, With The Exception Of A Few Individual Features, For A Different Person, Were It Not For The Existence Of The Chain Of Memories.