Herrmann Pidoux and Armand Trousseau stated 'Disease exists within us, because of us, and through us', Pasteur did not entirely disagree, 'This is true for certain diseases', he wrote cautiously, only to add immediately: 'I do not think that it is true for all of them'.

If you suppress laboratories, physical science will be stricken with barrenness and death.

Never will the doctrine of spontaneous generation recover from the mortal blow struck by this simple experiment.

My present and most fixed opinion regarding the nature of alcoholic fermentation is this: The chemical act of fermentation is essentially a phenomenon correlative with a vital act, beginning and ending with the latter. I believe that there is never any alcoholic fermentation without their being simultaneously the organization, development, multiplication of the globules, or the pursued, continued life of globules which are already formed.

Work usually follows will.

Chance favors the prepared mind.

Oh my goodness the mystery that has prompted my objective. My quality lies exclusively in my tirelessness.