“Young men, have confidence in those powerful and safe methods, of which we do not yet know all the secrets.”

— Louis Pasteur, The Life of Pasteur (1911), Volume II, p. 228

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 older I grow, the more I distrust the familiar doctrine that age brings wisdom.”

“Old age deprives the intelligent man only of qualities useless to wisdom.”

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

“My loneliness was born when men praised my talkative faults and blamed my silent virtues.”

“Not to know what happened before you were born is to be a child forever.”

“No man who knows aught, can be so stupid to deny that all men naturally were born free.”