“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 is the art of the possible not the impossible.”
“The past is fantasy, and the future is science fiction.”
“Probable impossibilities are to be preferred to improbable possibilities.”
“Dealing with the impossible, fantasy can show us what may be really possible. If there is grief, there is the possibility of consolation; if hurt, the possibility of healing; and above all, the curative power of hope. If fantasy speaks to us as we are, it also speaks to us as we might be.”