Worship the spirit of criticism. If reduced to itself it is not an awakener of ideas or a stimulant to great things, but, without it, everything is fallible; it always has the last word.

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

Oh my goodness the mystery that has prompted my objective. My quality lies exclusively in my tirelessness.

If you suppress laboratories, physical science will be stricken with barrenness and death.

Did you ever observe to whom the accidents happen? Chance favors only the prepared mind.

The Greeks understood the mysterious power of the below things. They are the ones who gave us one of the most beautiful words in our language, the word enthusiasm.

I propose to provide proof... that just as always an alcoholic ferment, the yeast of beer, is found where sugar is converted into alcohol and carbonic acid, so always a special ferment, a lactic yeast, is found where sugar is transformed into lactic acid. And, furthermore, when any plastic nitrogenated substance is able to transform sugar into that acid, the reason is that it is a suitable nutrient for the growth of the [lactic] ferment.