Science Always Has Its Origin In The

The Plain Man Is Familiar With Blindness And Deafness, And Knows From His Everyday Experience That The Look Of Things Is Influenced By His Senses; But It Never Occurs To Him To Regard The Whole World As The Creation Of His Senses.

Ordinarily Pleasure And Pain Are Regarded As Different From Sensations.

Scientists Must Use The Simplest Means Of Arriving At Their Results And Exclude Everything Not Perceived By The Senses.

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).

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.