Nothing Is Lost And Nothing

Without Theory, Practice Is But Routine Born Of Habit. Theory Alone Can Bring Forth And Develop The Spirit Of Inventions.

Whether Our Efforts Are, Or Not, Favored By Life, Let Us Be Able To Say, When We Come Near To The Great Goal, I Have Done What I Could.

To Demonstrate Experimentally That A Microscopic Organism Actually Is The Cause Of A Disease And The Agent Of Contagion, I Know No Other Way, In The Present State Of Science, Than To Subject The Microbe (the New And Happy Term Introduced By M. Sédillot) To The Method Of Cultivation Out Of The Body.

Never Will The Doctrine Of Spontaneous Generation Recover From The Mortal Blow Struck By This Simple Experiment.

Chance Favours A Prepared Mind.