Chance favors those who are prepared.
Let me tell you the secret that has led me to my goal. My strength lies solely in my tenacity.
Chance favors the prepared mind.
Science knows no country because it is the light that iluminates the world
Do not put forward anything that you cannot prove by experimentation.
If it is a terrifying thought that life is at the mercy of the multiplication of these minute bodies [microbes], it is a consoling hope that Science will not always remain powerless before such enemies.