The nineteenth century believed in science but the twentieth century does not.
The radical novelty of modern science lies precisely in the rejection of the belief... that the forces which move the stars and atoms are contingent upon the preferences of the human heart.
If we wish to make a new world we have the material ready. The first one, too, was made out of chaos.
In all science, error precedes the truth, and it is better it should go first than last.
There is one thing even more vital to science than intelligent methods; and that is, the sincere desire to find out the truth, whatever it may be.