Louis Pasteur

"Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world."

"Life is the loom on which fate weaves."

"The greatest derangement of the mind is to believe things because one wishes them to be so."

"Chance favors the prepared mind."

"Let me tell you the secret that has led me to my goal. My strength lies solely in my tenacity."

"Do not put away your microscopes."

"A person can change their thoughts, because they can choose what to think about."

"The role of the infinitely small in nature is infinitely great."

"Work, finish, publish."

"There are no shortcuts to any place worth going."

"Nothing is lost, nothing is created, everything is transformed."

"Imagination should guide thought."

"Without the germ theory, I would be unable to understand the deep causes of fermentation."

"The task of an excellent man is to increase the sum of human happiness."

"Two great scientists deserve to be loved by their country: one brings the truth and the other saves the life."

"Faith in science must be complete."

"In the fields of observation one must settle for luck; in the fields of imagination one must depend on logic."

"To think of science or to use its products while ignoring its method and philosophy is not just philosophically incoherent, it is a form of betrayal of rationality itself."

"The more carefully we study the world, the more wonderful it becomes."

"Fortune favors the bold."

"Germs are everywhere; it is pointless to try to avoid them."

"Each discovery opens new horizons."

"The greatest inspiration is imagination."

"Truth is not always an advantage."

"I am passionate about the unknown."

"When you leave a thing alone you leave it to a fate of molds and ferments - a kind of animal life."

"Man could not live if his efforts were determined only by a struggle for existence."

"The universe is a mystery, but an ordered one."

"Bad luck, good luck, who knows which is which."

"Seize the day and put the least trust in tomorrow."