"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

"The unread story is not a story; it is a sentence, a string of words, until it has been read. The reader is a collaborator."

"The trouble is that we have a bad habit, encouraged by pedants and sophisticates, of considering happiness as something rather stupid."

"Science fiction is not predictive; it is descriptive."

"I hate to be told by some guy in a suit that I shouldn't be writing about this or that because it's not 'marketable.'"