Show me a thoroughly satisfied man - and I will show you a failure.

Negative results are just what I want. They’re just as valuable to me as positive results. I can never find the thing that does the job best until I find the ones that don’t.

They say President Wilson has blundered. Perhaps he has, but I notice he usually blunders forward.

The inventor can't do it all, you've got to change people. We have an enormous capacity to invent super-machinery. But our desire to install the device is weak. Human inertia is the problem, not invention. Something in man makes him resist change.

The three things that are most essential to achievement are common sense, hard work and stick-to-it-iv-ness... Unfortunately, many of life's failures are experienced by people who did not realize how close they were to success when they gave up. I have far more respect for the person with a single idea who gets there than for the person with a thousand ideas who does nothing.

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

Let the public throw bouquets to the inventors and in time we will all be happy.