I must confess it was very unexpected and I am very startled at my metamorphosis into a chemist.

It was almost as incredible as if you fired a 15-inch shell at a piece of tissue paper and it came back and hit you.

I congratulate you both on a fine piece of work which I am sure will ultimately prove of importance. I am personally very much interested in your results... In the past I have tried a number of experiments... but without any success.

All of physics is either impossible or trivial. It is impossible until you understand it, and then it becomes trivial.

All science is either physics or stamp collecting.

The greatest contributor to the feeling of tension and fear of war arose from the power of the bombing aeroplane. If all nations would consent to abolish air bombardment . . . that would mean the greatest possible release from fear.

The only possible conclusion the social sciences can draw is: some do, some don't.