Mediocre Men Often Have The Most Acquired

Obervation Is A Passive Science, Experimentation Is An Active Science.

Priestley [said] That Each Discovery We Make Shows Us Many Others That Should Be Made.

It Is Impossible To Devise An Experiment Without A Preconceived Idea; Devising An Experiment, We Said, Is Putting A Question; We Never Conceive A Question Without An Idea Which Invites An Answer. I Consider It, Therefore, An Absolute Principle That Experiments Must Always Be Devised In View Of A Preconceived Idea, No Matter If The Idea Be Not Very Clear Nor Very Well Defined.

Theories Are Like A Stairway; By Climbing, Science Widens Its Horizon More And More, Because Theories Embody And Necessarily Include Proportionately More Facts As They Advance.

Ardent Desire For Knowledge, In Fact, Is The One Motive Attracting And Supporting Investigators In Their Efforts; And Just This Knowledge, Really Grasped And Yet Always Flying Before Them, Becomes At Once Their Sole Torment And Their Sole Happiness. Those Who Do Not Know The Torment Of The Unknown Cannot Have The Joy Of Discovery Which Is Certainly The Liveliest That The Mind Of Man Can Ever Feel.