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

In the realm of scientific observation, luck is granted only to those who are prepared.

Preconceived ideas are like searchlights which illumine the path of the experimenter and serve him as a guide to interrogate nature. They become a danger only if he transforms them into fixed ideas-this is why I should like to see these profound words inscribed on the threshold of all the temples of science: 'The greatest derangement of the mind is to believe in something because one wishes it to be so.'

The more I know, the more nearly is my faith that of the Breton peasant. Could I but know all I would have the faith of a Breton peasant woman.

Time is the best appraiser of scientific work, and I am aware that an industrial discovery rarely produces all its fruit in the hands of its first inventor.

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

These are the living springs of great thoughts and great actions. Everything grows clear in the reflections from the Infinite.