The flavor of wine is like delicate poetry.

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.

How do you know that the incessant progress of science will not compel scientists to consider that life has existed during eternity, and not matter?

Messieurs, c'est les microbes qui auront le dernier mot." (Gentlemen, it is the microbes who will have the last word.)

Without theory, practice is but routine born of habit. Theory alone can bring forth and develop the spirit of inventions.

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.'

Oh my goodness the mystery that has prompted my objective. My quality lies exclusively in my tirelessness.