Change only favours minds that are diligently looking and preparing for discovery.

I have the faith of a Breton peasant and by the time I die I hope to have the faith of a Breton peasant's wife.

Live in the serene peace of laboratories and libraries

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.

Where observation is concerned, chance favors only the prepared mind.

There is no such thing as a special category of science called applied science; there is science and its applications, which are related to one another as the fruit is related to the tree that has borne it.

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.