Whatever your career may be, do not let yourselves become tainted by a deprecating and barren scepticism.

The nights seem to me too long... I am often scolded by Madame Pasteur, but I tell her I shall lead her to fame.

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.

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.

The artificial products do not have any molecular dissymmetry; and I could not indicate the existence of a more profound separation between the products born under the influence of life and all the others.

Fortune favors the well-prepared.

One does not ask of one who suffers: What is your country and what is your religion? One merely says: You suffer, that is enough for me.