Man is the poet who kills, Woman the angel who eats.

We may exist in all universes, but 'hear' only one because of our limitations, the valve of our desires, our practical, physical needs. All is vibration, with nothing vibrating across no distance whatsoever. All is music. A universe, a world, is just one long difficult song. The difference between worlds is the difference between songs.

Ray Bradbury is, for many reasons, the most influential writer in my life. Throughout our long friendship, Ray supplied not only his terrific stories but a grand model of what a writer could be, should be, and yet rarely is: brilliant and charming and accessible, willing to tolerate and to teach, happy to inspire but also to be inspired.

Welcome to the truth of our world-a massive seed shot out to the stars, filled with deadly children. A seed designed to slay everything it touches.

Grief is not productive. It simply represents an inefficiency in accepting change of status.

For years, even before 9/11, I've been trying to warn that the threat from amateur biolabs will ultimately turn out to be far more troublesome than leakage from military labs - perhaps even more costly and deadly than nuclear terrorism.

It's kind of a misnomer about science fiction that science fiction is about anything other than people. It's about people doing stuff, sometimes doing extraordinary stuff.