Feeling Alone Guides The Mind.

In These Researches I Followed The Principles Of The Experimental Method That We Have Established, I.e., That, In Presence Of A Well-noted, New Fact Which Contradicts A Theory, Instead Of Keeping The Theory And Abandoning The Fact, I Should Keep And Study The Fact, And I Hastened To Give Up The Theory.

Progress Is Achieved By Exchanging Our Theories For New Ones Which Go Further Than The Old, Until We Find One Based On A Larger Number Of Facts. ... Theories Are Only Hypotheses, Verified By More Or Less Numerous Facts. Those Verified By The Most Facts Are The Best, But Even Then They Are Never Final, Never To Be Absolutely Believed.

The Stability Of The Internal Medium Is A Primary Condition For The Freedom And Independence Of Certain Living Bodies In Relation To The Environment Surrounding Them.

Our Ideas Are Only Intellectual Instruments Which We Use To Break Into Phenomena; We Must Change Them When They Have Served Their Purpose, As We Change A Blunt Lancet That We Have Used Long Enough.

The Mental Never Influences The Physical. It Is Always The Physical That Modifies The Mental, And When We Think That The Mind Is Diseased, It Is Always An Illusion.