Real genius is nothing else but the supernatural virtue of humility in the domain of thought.

Mathematics alone make us feel the limits of our intelligence. For we can always suppose in the case of an experiment that it is inexplicable because we don't happen to have all the data. In mathematics we have all the data, brought together in the full light of demonstration, and yet we don't understand. We always come back to the contemplation of our human wretchedness. What force is in relation to our will, the impenetrable opacity of mathematics is in relation to our intelligence.

The most important part of teaching is to teach what it is to know.

Time's violence rends the soul, by the rent eternity enters.

The demonstrable correlation of opposites is an image of the transcendental correlation of contradictories.

Man alone can enslave man.

War, which perpetuates itself under the form of preparation for war, has once and for all given the State an important role in production.