We haven't got the money, so we've got to think.

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've just finished reading some of my early papers, and you know, when I'd finished I said to myself, 'Rutherford, my boy, you used to be a damned clever fellow.' (1911)

That which is not measurable is not science. That which is not physics is stamp collecting.

Should a young scientist working with me come to me after two years of such work and ask me what to do next, I would advise him to get out of science. After two years of work, if a man does not know what to do next, he will never make a real scientist.

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

Radioactivity is shown to be accompanied by chemical changes in which new types of matter are being continually produced. .... The conclusion is drawn that these chemical changes must be sub-atomic in character.