Feeling Alone Guides The Mind.

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.

The Eloquence Of A Scientist Is Clarity; Scientific Truth Is Always More Luminous When Its Beauty Is Unadorned Than When It Is Tricked Out In The Embellishments With Which Our Imagination Would Seek To Clothe It.

When We Meet A Fact Which Contradicts A Prevailing Theory, We Must Accept The Fact And Abandon The Theory, Even When The Theory Is Supported By Great Names And Generally Accepted.

Hatred Is The Most Clear- Sighted, Next To Genius.

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