“Although my book is banned I am still allowed to go to China and travel. There is no longer the kind of control that Mao used to have-there have been deep fundamental changes in society.”

“And what is liberty, whose very name makes the heart beat faster and shakes the world? Is it not the union of all liberties - liberty of conscience, of education, of association, of the press, of travel, or labor, or trade?”

“I think it's important to travel around in order to get a notion of what's going on, to find out what people are think about. I enjoy talking on campuses most because people are more informed and discussion is generally livelier.”

“You can't expect the entire world to come to New York to see you. You have to travel to them.”

“I myself believe that there will one day be time travel because when we find that something isn't forbidden by the over-arching laws of physics we usually eventually find a technological way of doing it.”

“I wanted to travel with my dad to be close to him again. Having babies and raising my own family took so much of my time, I didn't have a chance to be with him very often.”

“Too often travel, instead of broadening the mind, merely lengthens the conversation.”

“The world is a country which nobody ever yet knew by description one must travel through it one's self to be acquainted with it.”

“After a lifetime of world travel I've been fascinated that those in the third world don't have the same perception of reality that we do.”