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

If you suppress laboratories, physical science will be stricken with barrenness and death.

Worship the spirit of criticism. If reduced to itself it is not an awakener of ideas or a stimulant to great things, but, without it, everything is fallible; it always has the last word.

The more I know, the more nearly is my faith that of the Breton peasant. Could I but know all I would have the faith of a Breton peasant woman.

In good philosophy, the word cause ought to be reserved to the single Divine impulse that has formed the universe.

The controls of life are structured as forms and nuclear arrangements, in a relation with the motions of the universe.

Posterity will one day laugh at the foolishness of modern materialistic philosophers.