The Ego Is As Little Absolutely Permanent

A Colour Is A Physical Object As Soon As We Consider Its Dependence, For Instance, Upon Its Luminous Source, Upon Other Colours, Upon Temperatures, Upon Spaces, And So Forth.

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.

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.

My Table Is Now Brightly, Now Dimly Lighted. Its Temperature Varies. It May Receive An Ink Stain. One Of Its Legs May Be Broken. It May Be Repaired, Polished, And Replaced Part By Part. But, For Me, It Remains The Table At Which I Daily Write.

Strange As It May Sound, The Power Of Mathematics Rests On Its Evasion Of All Unnecessary Thought And On Its Wonderful Saving Of Mental Operations.