Science is the most intimate school of resignation and humility, for it teaches us to bow before the seemingly most insignificant of facts.

If it is nothingness that awaits us, let us make an injustice of it, let us fight against destiny, even without hope of victory.

Knowledge for the sake of knowledge! Truth for truth's sake! This is inhuman.

The truth is that my work - I was going to say my mission - is to shatter the faith of men here, there, and everywhere, faith in affirmation, faith in negation, and faith in abstention in faith, and this for the sake of faith in faith itself; it is to war against all those who submit, whether it be to Catholicism, or to rationalism, or to agnosticism; it is to make all men live the life of inquietude and passionate desire.

Sow the living part of yourselves in the furrow of life.

The supreme triumph of reason is to cast doubt upon its own validity.

We never know, believe me, when we have succeeded best.