All Experience Is Subjective.

Our Initial Sensory Data Are Always "first Derivatives," Statements About Differences Which Exist Among External Objects Or Statements About Changes Which Occur Either In Them Or In Our Relationship To Them. Objects And Circumstances Which Remain Absolutely Constant Relative To The Observer, Unchanged Either By His Own Movement Or By External Events, Are In General Difficult And Perhaps Always Impossible To Perceive. What We Perceive Easily Is Difference And Change And Difference Is A Relationship.

Science, Like Art, Religion, Commerce, Warfare, And Even Sleep, Is Based On Presuppositions. It Differs, However, From Most Other Branches Of Human Activity In That Not Only Are The Pathways Of Scientific Thought Determined By The Presuppositions Of The Scientists But Their Goals Are The Testing And Revision Of Old Presuppositions And The Creation Of New.

Number Is Different From Quantity. This Difference Is Basic For Any Sort Of Theorizing In Behavioral Science, Any Sort Of Imagining Of What Goes On Between Organisms Or Inside Organisms As Part Of Their Processes Of Thought.

Language Commonly Stresses Only One Side Of Any Interaction.

Somebody Was Saying To Picasso That He Ought To Make Pictures Of Things The Way They Are-objective Pictures. He Mumbled That He Wasn't Quite Sure What That Would Be. The Person Who Was Bullying Him Produced A Photograph Of His Wife From His Wallet And Said, "there, You See, That Is A Picture Of How She Really Is." Picasso Looked At It And Said, "she Is Rather Small, Isn't She? And Flat?"