First Causes Are Outside The Realm Of

Laplace Considers Astronomy A Science Of Observation, Because We Can Only Observe The Movements Of The Planets; We Cannot Reach Them, Indeed, To Alter Their Course And To Experiment With Them. "on Earth," Said Laplace, "we Make Phenomena Vary By Experiments; In The Sky, We Carefully Define All The Phenomena Presented To Us By Celestial Motion." Certain Physicians Call Medicine A Science Of Observations, Because They Wrongly Think That Experimentation Is Inapplicable To It.

Those Who Do Not Know The Torment Of The Unknown Cannot Have The Joy Of Discovery.

Effects Vary With The Conditions Which Bring Them To Pass, But Laws Do Not Vary. Physiological And Pathological States Are Ruled By The Same Forces; They Differ Only Because Of The Special Conditions Under Which The Vital Laws Manifest Themselves.

The Experimenter Who Does Not Know What He Is Looking For Will Not Understand What He Finds.

To Be Worthy Of The Name, An Experimenter Must Be At Once Theorist And Practitioner. While He Must Completely Master The Art Of Establishing Experimental Facts, Which Are The Materials Of Science, He Must Also Clearly Understand The Scientific Principles Which Guide His Reasoning Through The Varied Experimental Study Of Natural Phenomena. We Cannot Separate These Two Things: Head And Hand. An Able Hand, Without A Head To Direct It, Is A Blind Tool; The Head Is Powerless Without Its Executive Hand.