The devil is an angel too.

Philosophy fulfills the need to create for ourselves a single and complete concept of the world and of life.

Martyrs create faith, faith does not create martyrs.

Man dies of cold, not of darkness.

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.

Science is a cemetery of dead ideas, even though life may issue from them.

What we believe to be the motives of our conduct are usually but the pretexts for it.