Personally, People Know Themselves Very Poorly.

Thing, Body, Matter, Are Nothing Apart From The Combinations Of The Elements, - The Colours, Sounds, And So Forth - Nothing Apart From Their So-called Attributes.

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.

Not Bodies Produce Sensations, But Element-complexes (sensation-complexes) Constitute The Bodies. When The Physicist Considers The Bodies As The Permanent Reality, The 'elements' As The Transient Appearance, He Does Not Realise That All 'bodies' Are Only Mental Symbols For Element-complexes (sensation-complexes).

The Presentations And Conceptions Of The Average Man Of The World Are Formed And Dominated, Not By The Full And Pure Desire For Knowledge As An End In Itself, But By The Struggle To Adapt Himself Favourably To The Conditions Of Life.

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.