One must not assume that an understanding of science is present in those who borrow the language

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

Chance favors the prepared mind.

It is not the germs we need worry about. It is our inner terrain.

Since the most ancient times, all men, and particularly those who endeavored in the practice of medicine, have brought closer together two natural phenomena of capital importance: illness or fever and fermentation.

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.

In the realm of scientific observation, luck is granted only to those who are prepared.