"Accelerating change has become almost the first fact of life."

"Two weeks passed, by the time of the ship—physiological time, that measured by heartbeats and all bodily rhythms, in …"

"The criticism of SF has tapped rich new vines for researchers, and I can think of writers who seem to be trying harde…"

"Science fiction, as I like to define it, is fiction based on the imagined exploration of scientific possibility. The …"

"Considering the uses of science fiction, I think it must first of all offer entertainment, before the the futurology …"

"Getting back at last to our initial question: Will academe kill SF? I don’t think so… I do suspect that the critics a…"

"Human belief is seldom related to truth."

"Human knowledge is never entirely consistent or complete, because the human brain is only a crude and transient mass …"

"“I wonder—?” whispered April Bell, her long eyes narrowed and dark. “I wonder what they really found?” “Whatever it i…"

"SF still appeals to the young, as always, because so much of it is set in the futures in which they will be living."