Modern science fiction is the only form of literature that consistently considers the nature of the changes that face us.

How often people speak of art and science as though they were two entirely different things, with no interconnection. That is all wrong. The true artist is quite rational as well as imaginative and knows what he is doing; if he does not, his art suffers. The true scientist is quite imaginative as well as rational, and sometimes leaps to solutions where reason can follow only slowly; if he does not, his science suffers.

I never considered myself a patriot. I like to think I recognize only humanity as my nation.

To all my gentle readers who have treated me with love for over 30 years, I must say farewell. It has always been my ambition to die in harness with my head face down on a keyboard and my nose caught between two of the keys, but that's not the way it worked out. I have had a long and happy life and I have no complaints about the ending, thereof, and so farewell - farewell.

The greatest weapons in the conquest of knowledge are an understanding mind and the inexorable curiosity that drives it on.

Life is glorious when it is happy; days are carefree when they are happy; the interplay of thought and imagination is far superior to that of muscle and sinew.

Nothing has to be true, but everything has to sound true.