An atheist may be simply one whose faith and love are concentrated on the impersonal aspects of God.

As soon as men know that they can kill without fear of punishment or blame, they kill; or at least they encourage killers with approving smiles.

All the Freudian system is impregnated with the prejudice which it makes it its mission to fight -- the prejudice that everything sexual is vile.

It is an eternal obligation toward the human being not to let him suffer from hunger when one has a chance of coming to his assistance.

Evil is license, and that is why it is monotonous: everything has to be drawn from ourselves. One is condemned to false infinity. That is hell itself.

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 poison of skepticism becomes, like alcoholism, tuberculosis, and some other diseases, much more virulent in a hitherto virgin soil.