Twenty thousand years ago the family was the social unit. Now the social unit has become the world, in which it may truthfully be said that each person's welfare affects that of every other.

Yet is it possible in terms of the motion of atoms to explain how men can invent an electric motor, or design and build a great cathedral? If such achievements represent anything more than the requirements of physical law, it means that science must investigate the additional controlling factors, whatever they may be, in order that the world of nature may be adequately understood.

My first feeling about the paper and the attitude is that it is absurd.

The story is told of Lord Kelvin, a famous Scotch physicist of the last century, that after he had given a lecture on atoms and molecules, one of his students came to him with the question, "Professor, what is your idea of the structure of the atom." "What," said Kelvin, "The structure of the atom? Why, don't you know, the very word 'atom' means the thing that can't be cut. How then can it have a structure?" "That," remarked the facetious young man, "shows the disadvantage of knowing Greek."

Life in the twentieth century undeniably has ... such richness, joy and adventure as were unknown to our ancestors except in their dreams.

Science can have no quarrel with a religion which postulates a God to whom men are His children.

To make the moral achievement implicit in science a source of strength to civilization, the scientist will have to have the cooperation also of the philosopher and the religious teacher.