“One does not ask of one who suffers: What is your country and what is your religion? One merely says: You suffer, that is enough for me.” 

—Louis Pasteur, chemist and bacteriologist (27 Dec 1822-1895). 

“Do not let yourself be tainted with a barren skepticism.”
—Louis Pasteur.

“Let me tell you the secret that has led to my goal: My strength lies solely in my tenacity.”
— Louis Pasteur,
chemist and microbiologist.