Great steps in human progress are made by things that don't work the way philosophy thought they should. If things always worked the way they should, you could write the history of the world from now on. But they don't, and it is those deviations from the normal that make human progress.

An inventor fails 999 times, and if he succeeds once, he's in. He treats his failures simply as practice shots.

Don't bring anything to me but trouble.

What I believe is that, by proper effort, we make the future almost anything we want to make it.

A research problem is not solved by apparatus; it is solved in a man's head.

The opportunities of man are limited only by his imagination. But so few have imagination that there are ten thousand fiddlers to one composer.

We need to teach the highly educated man that it is not a disgrace to fail and that he must analyze every failure to find its cause. He must learn how to fail intelligently, for failing is one of the greatest arts in the world.