Louis Pasteur — "I am on the edge of mysteries and the veil is getting thinner and thinner."

"I have been for the past three years studying a disease which is called hydrophobia, or rabies. It is a disease which I believe to be caused by a microbe."

"When I approach a child, he inspires in me two sentiments: tenderness for what he is, and respect for what he may become."

"The true character of a man is revealed in his actions, not in his words."

"The more progress physical sciences make, the more they give us cause to believe that all phenomena are reducible to molecular forces."

"If I had the honor of being a surgeon… I would not only use absolutely clean instruments, but after having cleaned my hands with the greatest care, I would subject them to a rapid flaming."