It would seem to me that I was committing a theft if I were to let one day go by without doing some work.

To bring one's self to believe in a truth that has just dawned upon one is the first step towards progress; to persuade others is the second.

Do not put forward anything that you cannot prove by experimentation.

Live in the serene peace of laboratories and libraries

If you suppress laboratories, physical science will be stricken with barrenness and death.

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.

Whatever your career may be, do not let yourselves become tainted by a deprecating and barren scepticism.