Man Can Learn Nothing Unless He Proceeds

Men Who Have Excessive Faith In Their Theories ... Make Poor Observations, Because They Choose Among The Results Of Their Experiments Only What Suits Their Object, Neglecting Whatever Is Unrelated To It And Carefully Setting Aside Everything Which Might Tend Toward The Idea They Wish To Combat

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

The First Entirely Vital Action, So Termed Because It Is Not Effected Outside The Influence Of Life, Consists In The Creation Of The Glycogenic Material In The Living Hepatic Tissue. The Second Entirely Chemical Action, Which Can Be Effected Outside The Influence Of Life, Consists In The Transformation Of The Glycogenic Material Into Sugar By Means Of A Ferment.

In Science, The Best Precept Is To Alter And Exchange Our Ideas As Fast As Science Moves Ahead.

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.