As in the experimental sciences, truth cannot be distinguished from error as long as firm principles have not been established through the rigorous observation of facts.

The artificial products do not have any molecular dissymmetry; and I could not indicate the existence of a more profound separation between the products born under the influence of life and all the others.

Work usually follows will.

One must not assume that an understanding of science is present in those who borrow the language

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

Life comes only from life.

Science knows no country because it is the light that iluminates the world