The Fact Is, Every Thinker, Every Philosopher,

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

The Biological Task Of Science Is To Provide The Fully Developed Human Individual With As Perfect A Means Of Orientating Himself As Possible. No Other Scientific Ideal Can Be Realised, And Any Other Must Be Meaningless.

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.

I Once Knew An Otherwise Excellent Teacher Who Compelled His Students To Perform All Their Demonstrations With Incorrect Figures, On The Theory That It Was The Logical Connection Of The Concepts, Not The Figure, That Was Essential.

A Movement That We Will To Execute Is Never More Than A Represented Movement, And Appears In A Different Domain From That Of The Executed Movement, Which Always Takes Place When The Image Is Vivid Enough.