The greatest derangement of the mind is to believe in something because one wishes it to be so.
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.
To bring one’s self to believe in a truth that has just dawned upon one is the first step towards progress; to persuade others is the second.
Where are the real sources of human dignity, freedom and modern democracy, if not in the concept of infinity to which all men are equal?
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.
You have not succeeded in your experiments, that is all there is to it.
Outsidetheir laboratories, thephysicianand chemist are soldiers without arms on the field of battle.
Science proceeds by successive answers to questions more and more subtle, coming nearer and nearer to the very essence of phenomena.
Worship the spirit of criticism.
Happy is he who bears a god within.
When one works and imagines and dreams of nothing else than the search for answers that God has posed, it is difficult to be so still.
Posterity will one day laugh at the foolishness of modern materialistic philosophers.
Life comes only from life.
The universe is asymmetric.
Bernard was right. The germ is nothing, the terrain is everything.
Imagination should give wings to our thoughts but we always need decisive experimental proof, and when the moment comes to draw conclusions and to interpret the gathered observations, imagination must be checked and documented by the factual results of the experiment.
It would seem to me that I was committing a theft if I were to let one day go by without doing some work.
The greatest malfunction of spirit is to believe things.
Analogy cannot serve as proof.
Science and peace will triumph over ignorance and war.