Analogy cannot serve as proof.

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.

The greatest derangement of the mind is to believe in something because one wishes it to be so.

One does not ask of one who suffers: What is your country and what is your religion? One merely says: You suffer, that is enough for me.

We affirm the neutrality of Science ... Science is of no country. ... But if Science has no country, the scientist must keep in mind all that may work towards the glory of his country. In every great scientist will be found a great patriot.

Life comes only from life.

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