Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world. Science is the highest personification of the nation because that nation will remain the first which carries the furthest the works of thought and intelligence.

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.

There is a time in every man's life when he looks to his God, when he looks at his life, when he wonders how he will be remembered.

There is no such thing as applied science, only the application of pure science.

Every chemical substance, whether natural or artificial, falls into one of two major categories, according to the spatial characteristic of its form. The distinction is between those substances that have a plane of symmetry and those that do not. The former belong to the mineral, the latter to the living world.

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?