Education is man's going forward from cocksure ignorance to thoughtful uncertainty.Where there is an open mind there will always be a frontier.

If you want to kill any idea in the world, get a committee working on it.

Obsolescence is a factor which says that the new thing I bring you is worth more than the unused value of the old thing.

In America we can say what we think, and even if we can't think, we can say it anyhow.

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.

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.

I expect to spend the rest of my life in the future, so I want to be reasonably sure of what kind of future it's going to be. That is my reason for planning.