“Any fool can know. The point is to understand.”

“Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand.”

“Since the mathematicians have invaded the theory of relativity I do not understand it myself any more.”

“Peace cannot be kept by force; it can only be achieved by understanding.”

“You do not really understand something unless you can explain it to your grandmother.”

“Einstein was once asked how many feet are in a mile. Einstein's reply was "I don't know, why should I fill my brain with facts I can find in two minutes in any standard reference book?”

“Anger dwells only in the bosom of fools.”