I am 67, but I'm not too old to make a fresh start.

When you become quiet, it just dawns on you

Radio is just a fashion contrivance that will soon die out. It is obvious that there never will be invented a proper receiver!

One might think that the money value of an invention constitutes its reward to the man who loves his work. But... I continue to find my greatest pleasure, and so my reward, in the work that precedes what the world calls success.

I have not failed. I have successfully discovered 1200 ideas that don't work.

The biggest failure of man is that he gives up before he realizes how close he was to success.

Personally, I enjoy working about 18 hours a day. Besides the short catnaps I take each day, I average about four to five hours of sleep per night.