Imagination should give wings to our thoughts but we always need decisive experimental proof, and when the moment comes to draw conclusions and to interpret the gathered observations, imagination must be checked and documented by the factual results of the experiment.

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

The nights seem to me too long... I am often scolded by Madame Pasteur, but I tell her I shall lead her to fame.

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

Chance favours the trained mind.

Chance favors those who are prepared.

The greatest malfunction of spirit is to believe things.