“Certain details will age, as do the fashions of another time, but the foundation, the method, constitute one of those great aspects of the human mind, the majesty of which is only increased by years.”

— Louis Pasteur, The Life of Pasteur (1902)

About Louis Pasteur

1822 – 1895

French chemist and microbiologist who developed pasteurization and helped establish the germ theory of disease.

“Chance favors only the prepared mind.”

“In the fields of observation chance favours only the prepared mind.”

“There does not exist a category of science to which one can give the name applied science.”

“The young have exalted notions, because they have not been humbled by life or learned its necessary limitations.”

“It would be thought a hard Government that should tax its People one-tenth Part of their Time, to be employed in its Service.”

“The long, dull monotonous years of middle-aged prosperity or middle-aged adversity are excellent campaigning weather.”

“A boy's will is the wind's will, and the thoughts of youth are long, long thoughts.”

“Finally, from so little sleeping and so much reading, his brain dried up and he went completely out of his mind.”

“My hair is grey, but not with years, nor grew it white in a single night, as men's have grown from sudden fears.”