Attempting to define science fiction is an undertaking almost as difficult, though not so popular, as trying to define pornography... In both pornography and SF, the problem lies in knowing exactly where to draw the line.

The greatest tragedy in mankind's entire history may be the hijacking of morality by religion.

Perhaps no other year before or since 1984 has been awaited with such eager anticipation.

Astronomy, as nothing else can do, teaches men humility.

I want to be remembered most as a writer - one who entertained readers, and, hopefully, stretched their imagination as well.

Sometimes when I'm in a bookstore or library, I am overwhelmed by all the things that I do not know. Then I am seized by a powerful desire to read all the books, one by one.

Perhaps, as some wit remarked, the best proof that there is Intelligent Life in Outer Space is the fact it hasn't come here. Well, it can't hide forever - one day we will overhear it.