We were deliberately designed to learn only by trial and error. We're brought up, unfortunately, to think that nobody should make mistakes. Most children get de-geniused by the love and fear of their parents - that they might make a mistake. But all my advances were made by mistakes. You uncover what is when you get rid of what isn't.

Nature is all that we think we know plus all that we don't know whether or not we know that we don't know it.

I would say, then, that you are faced with a future in which education is going to be number one amongst the great world industries.

The World has become too dangerous for anything less than Utopia.

The Things to do are: the things that need doing, that you see need to be done, and that no one else seems to see need to be done.

I set about fifty-five years ago (1927) to see what a penniless, unknown human individual with a dependent wife and newborn child might be able to do effectively on behalf of all humanity

Sharing is having more.