To say nothing, especially when speaking, is half the art of diplomacy.

There have been only 268 of the past 3,421 years free of war.

We Americans are the best informed people on earth as to the events of the last twenty-four hours; we are the not the best informed as the events of the last sixty centuries.

Sixty years ago I knew everything; now I know nothing; education is a progressive discovery of our own ignorance.

Besides numerous science courses, I had the opportunity to study philosophy, the history of architecture, economics, and Russian history in courses taught by extraordinarily knowledgeable professors.

Art, like science, progresses, and to me it's bizarre that a lot of acclaimed and popular and respectable books are not advancing the art form.

Doctor Who' is the most original science-fiction television series ever made. It is also one of the longest-running television shows of all time.

Science fiction has always been a means for political comment. H.G. Wells' 'The War of the Worlds' wasn't about a Martian invasion - it was a critique of British colonialism, and... 'The Time Machine' is really an indictment of the British class system.