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

- Charles Kettering

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

- Charles Kettering

The price of progress is trouble.

- Charles Kettering

A problem well stated is a problem half-solved.

- Charles Kettering

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

- Charles Kettering

If you're doing something the same way you have been doing it for ten years, the chances are you are doing it wrong.

- Charles Kettering

I am not interested in the past. I am interested in the future, for that is where I expect to spend the rest of my life.

- Charles Kettering

Believe and act as if it were impossible to fail.

- Charles Kettering

The world hates change, yet it is the only thing that has brought progress.

- Charles Kettering