“I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.”

Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either.

Reality is merely an illusion, albeit a very persistent one.

Once we accept our limits, we go beyond them.

We cannot solve our problems with the same thinking we used when we created them.

Logic will get you from A to B. Imagination will take you everywhere.

Peace cannot be kept by force. It can only be achieved by understanding.

The only real valuable thing is intuition.