Science Does Not Permit Exceptions.

All The Vital Mechanisms, Varied As They Are, Have Only One Object, That Of Preserving Constant The Conditions Of Life In The Internal Environment.

Well-observed Facts, Though Brought To Light By Passing Theories, Will Never Die; They Are The Material On Which Alone The House Of Science Will At Last Be Built.

The True Worth Of An Experimenter Consists In His Pursuing Not Only What He Seeks In His Experiment, But Also What He Did Not Seek.

I Do Not ... Reject The Use Of Statistics In Medicine, But I Condemn Not Trying To Get Beyond Them And Believing In Statistics As The Foundation Of Medical Science. ... Statistics ... Apply Only To Cases In Which The Cause Of The Facts Observed Is Still [uncertain Or] Indeterminate. ... There Will Always Be Some Indeterminism ... In All The Sciences, And More In Medicine Than In Any Other. But Man's Intellectual Conquest Consists In Lessening And Driving Back Indeterminism In Proportion As He Gains Ground For Determinism By The Help Of The Experimental Method.

When Entering On New Ground We Must Not Be Afraid To Express Even Risky Ideas So As To Stimulate Research In All Directions. As Priestley Put It, We Must Not Remain Inactive Through False Modesty Based On Fear Of Being Mistaken.