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

Gentlemen, now you will see that now you see nothing. And why you see nothing you will see presently.

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

The great object is to find the theory of the matter [of X-rays] before anyone else, for nearly every professor in Europe is now on the warpath.

A good scientific theory should be explicable to a barmaid.

If your experiment needs statistics, you ought to have done a better experiment.

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