Two per cent. is genius, and ninety-eight per cent. is hard work.

To Monsieur Eiffel the Engineer, the brave builder of so gigantic and original a specimen of modern Engineering from one who has the greatest respect and admiration for all Engineers including the Great Engineer the Bon Dieu.

There is a better way for everything. Find it.

I never did anything worth doing by accident, nor did any of my inventions come indirectly through accident, except the phonograph. No, when I have, fully decided that a result is worth getting, I go about it, and make trial after trial, until it comes.

The doctor of the future will give no medicine, but will involve the patient in the proper use of food, fresh air and exercise

I have not failed. I've just found 10,000 ways that won't work.

Not only will atomic power be released, but someday we will harness the rise and fall of the tides and imprison the rays of the sun.