Never will the doctrine of spontaneous generation recover from the mortal blow struck by this simple experiment.

There are no such things as applied sciences, only applications of science.

You have not succeeded in your experiments, that is all there is to it.

Herrmann Pidoux and Armand Trousseau stated 'Disease exists within us, because of us, and through us', Pasteur did not entirely disagree, 'This is true for certain diseases', he wrote cautiously, only to add immediately: 'I do not think that it is true for all of them'.

Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world.

Virulence appears in a new light which cannot but be alarming to humanity; unless nature, in her evolution down the ages (an evolution which, as we now know, has been going on for millions, nay, hundreds of millions of years), has finally exhausted all the possibilities of producing virulent or contagious diseases - which does not seem very likely.

Science knows no country because it is the light that iluminates the world