"It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is most adaptable to change."

"The universe is asymmetric."

"Life is a germ, and a germ is life. The living organism is the highest, the most complicated, and the most beautiful of all chemical machines."

"I am convinced that I have found the cause of fermentation."

"Messieurs, c'est les microbes qui auront le dernier mot. (Gentlemen, it is the microbes who will have the last word.)"