“Science fiction writers, I am sorry to say, really do not know anything. We can't talk about science, because our knowledge of it is limited and unofficial, and usually our fiction is dreadful.”

“Science fiction is the most important literature in the history of the world, because it's the history of ideas, the history of our civilization birthing itself. ...Science fiction is central to everything we've ever done, and people who make fun of science fiction writers don't know what they're talking about.”

“Sometimes people say that we're living in the future, and time's up for science fiction, but I think that never will be, because science fiction really isn't about the future. It's about change and present-day concerns”

“When I began to write fiction that I knew would be published as science fiction, [and] part of what I brought to it was the critical knowledge that science fiction was always about the period in which it was written.”

“Science fiction is the arena of the not-yet, and every science fiction story has this element of not-yet-ness — usually a bit of technology or a scientific discovery that we don't know about in the real world of the present but that might be a possibility in the future.”

“As often I have been a science fiction writer writing science fiction for the community of science fiction readers, I am also, for good or ill, an American writing American literature to an American audience. Most fundamentally, though, I am a human being writing human literature to a human audience.”