We are saddled with a culture that hasn't advanced as far as science. Scientific man is already on the moon, and yet we are still living with the moral concepts of Homer. Hence this upset, this disequilibrium that makes weaker people anxious and apprehensive, that makes it so difficult for them to adapt to the mechanism of modern life. ... We live in a society that compels us to go on using these concepts, and we no longer know what they mean. In the future not soon, perhaps by the twenty-fifth century these concepts will have lost their relevance. I can never understand how we have been able to follow these worn-out tracks, which have been laid down by panic in the face of nature. When man becomes reconciled to nature, when space becomes his true background, these words and concepts will have lost their meaning, and we will no longer have to use them.