The essential thing to know about God is that God is Good. All the rest is secondary.

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

It seemed to me certain, and I still think so today, that one can never wrestle enough with God if one does so out of pure regard for the truth. Christ likes us to prefer truth to him because, before being Christ, he is truth. If one turns aside from him to go toward the truth, one will not go far before falling into his arms.

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.

Someone who does not see a pane of glass is not aware of not seeing it.

The payment of debts is necessary for social order. The non-payment is quite equally necessary for social order. For centuries humanity has oscillated, serenely unaware, between these two contradictory necessities.

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