“The past is fantasy, and the future is science fiction.”

“Science Fiction has rivets, fantasy has trees.”

“Science fiction deals with improbable possibilities, fantasy with plausible impossibilities.”

“Fantasy is the impossible made probable. Science Fiction is the improbable made possible.”

“Science fiction inspires scientists, but it doesn't exist to dictate what our future should look like. Great science fiction is fun to read and it makes you think, period. Claiming anything more than that is dicey. Grand visions of the future were more prevalent in the golden-age science fiction, but all fiction is a reflection of the current times. As science moves more quickly, the horizon of science fiction tends to recede closer to the present.”

“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”