To demonstrate experimentally that a microscopic organism actually is the cause of a disease and the agent of contagion, I know no other way, in the present state of Science, than to subject the microbe (the new and happy term introduced by M. Sédillot) to the method of cultivation out of the body.

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

The grandeur of the acts of men are measured by the inspiration from which they spring.

Bernard was right. The germ is nothing, the terrain is everything.

If science has no country, the scientist should have one, and ascribe to it the influence which his works may have in this world.

Chance favours a prepared mind.

The Greeks bequeathed to us one of the most beautiful words in our language--the word 'enthusiasm'--en theos--a god within. The grandeur of human actions is measured by the inspiration from which they spring. Happy is he who bears a god within, and who obeys it.