Wine is the healthiest and most health-giving of drinks.

Change only favours minds that are diligently looking and preparing for discovery.

Posterity will one day laugh at the sublime foolishness of the modern materialistic philosophy. The more I study nature, the more I stand amazed at the work of the Creator. I pray while I am engaged at my work in the laboratory.

Time is the best appraiser of scientific work, and I am aware that an industrial discovery rarely produces all its fruit in the hands of its first inventor.

My strength lies solely in my tenacity.

Messieurs, c'est les microbes qui auront le dernier mot." (Gentlemen, it is the microbes who will have the last word.)

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