I would rather have questions that can't be answered than answers that can't be questioned.

I think Nature's imagination is so much greater than man's, she's never gonna let us relax!

The real question of government versus private enterprise is argued on too philosophical and abstract a basis. Theoretically, planning may be good. But nobody has ever figured out the cause of government stupidity—and until they do (and find the cure), all ideal plans will fall into quicksand.

The unanswerable mysteries... the attitude that all is uncertain... to summarize it - the humility of the intellect.

We have been led to imagine all sorts of things infinitely more marvelous than the imagining of poets and dreamers of the past. It shows that the imagination of nature is far, far greater than the imagination of man. For instance, how much more remarkable it is for us all to be stuck-half of us upside down-by a mysterious attraction, to a spinning ball that has been swinging in space for billions of years, than to be carried on the back of an elephant supported on a tortoise swimming in a bottomless sea.

I wonder why. I wonder why. I wonder why I wonder.

I am not interested in what today's mathematicians find interesting.