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.

It is essential for men of science to take an interest in the administration of their own affairs or else the professional civil servant will step in - and then the Lord help you.

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

All scientific men will be delighted to extend their warmest congratulations to Tesla and to express their appreciation of his great contributions to science.

I have to keep going, as there are always people on my track. I have to publish my present work as rapidly as possible in order to keep in the race. The best sprinters in this road of investigation are Becquerel and the Curies.

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.