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

Scientists
Louis Pasteur
French chemist and microbiologist born in 1822 who proved that microorganisms cause fermentation and disease. He developed the rabies vaccine and pasteurization, founding modern bacteriology.
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Louis Pasteur's Other Quotes
Related Quotes
Endure and renounce.
-- Epictetus
Fire tests gold; adversity tests strong people.
-- Seneca
Bodily pain does not last without limit; intense pain is brief in duration.
-- Epicurus
If you carve without ceasing, even metal and stone can be engraved.
-- Xunzi
He who has a why to live can bear almost any how.
-- Friedrich Nietzsche
Energy and persistence conquer all things.
-- Benjamin Franklin