“If perchance you should falter during the journey, a hand would be there to support you.”

— Louis Pasteur, The Life of Pasteur (1902), p. 19

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.”

“He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has.”

Attribution note: Source disputed or unverified.

“Knowing yourself is the beginning of all wisdom.”

Attribution note: Source disputed or unverified.

“Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.”

“He who knows others is wise; he who knows himself is enlightened.”

Attribution note: Source disputed or unverified.

“The man who asks a question is a fool for a minute, the man who does not ask is a fool for life.”

“The truth is rarely pure and never simple.”