Charles Kettering

There is a great difference between knowing and understanding: you can know a lot about something and not really understand it.

Knowing is not understanding. There is a great difference between knowing and understanding: you can know a lot about something and not really understand it.

You can't have a better tomorrow if you are thinking about yesterday all the time.

High achievement always takes place in the framework of high expectation.

People are very open-minded about new things - as long as they're exactly like the old ones.

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

I object to people running down the future. I am going to live all the rest of my life there.

My interest is in the future because I am going to spend the rest of my life there.

A problem well stated is a problem half-solved.

Thinking is one thing no one has ever been able to tax.

An inventor is simply a fellow who doesn't take his education too seriously.

The only time you mustn't fail is the last time you try.