Chance Favors Those Who Are Prepared.

No, There Is Now No Circumstance Known In Which It Can Be Affirmed That Microscopic Beings Came Into The World Without Germs, Without Parents Similar To Themselves. Those Who Affirm It Have Been Duped By Illusions, By Ill-conducted Experiments, Spoilt By Errors That They Either Did Not Perceive Or Did Not Know How To Avoid.

The Only Thing That Can Bring Joy Is Work.

If Science Has No Country, The Scientist Should Have One, And Ascribe To It The Influence Which His Works May Have In This World.

Preconceived Ideas Are Like Searchlights Which Illumine The Path Of The Experimenter And Serve Him As A Guide To Interrogate Nature. They Become A Danger Only If He Transforms Them Into Fixed Ideas-this Is Why I Should Like To See These Profound Words Inscribed On The Threshold Of All The Temples Of Science: 'the Greatest Derangement Of The Mind Is To Believe In Something Because One Wishes It To Be So.'

Analogy Cannot Serve As Proof.