“Those who affirm it have been duped by illusions, by ill-conducted experiments, spoilt by errors that they either did not perceive or did not know how to avoid.”

— Louis Pasteur, Soirées scientifiques de la Sorbonne (1864), translation from The Life of Pasteur, p. 142

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.”

“If to do were as easy as to know what were good to do, chapels had been churches, and poor men's cottages princes' palaces.”

“Always take the short cut; and that is the rational one. Therefore say and do everything according to soundest reason.”

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

“Poetry is finer and more philosophical than history; for poetry expresses the universal, and history only the particular.”

“I assert that the cosmic religious experience is the strongest and noblest driving force behind scientific research.”

“There is no logical path to these laws; only intuition, resting on sympathetic understanding of experience, can reach them.”