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 it is a terrifying thought that life is at the mercy of the multiplication of these minute bodies [microbes], it is a consoling hope that Science will not always remain powerless before such enemies.

Did you ever observe to whom the accidents happen? Chance favors only the prepared mind.

The controls of life are structured as forms and nuclear arrangements, in a relation with the motions of the universe.

In matters of observation chance favors only the prepared mind. (not literal translation) - Dan's les champs de observation le hasard ne favorise que les esprits prepares.

Do not promote what you can't explain, simplify, and prove early.

How do you know that the incessant progress of science will not compel scientists to consider that life has existed during eternity, and not matter?