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

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

Wine is the most healthful and most hygienic of beverages.

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.

When I approach a child, he inspires in me two sentiments; tenderness for what he is, and respect for what he may become.

In good philosophy, the word cause ought to be reserved to the single Divine impulse that has formed the universe.

Intuition is given only to him who has undergone long preparation to receive it.