"SF is the literature of the theoretically possible, and F is the literature of the impossible"

"Mother love is the fuel that enables a normal human being to do the impossible"

"What is real is not the external form, but the essence of things... it is impossible for anyone to express anything essentially real by imitating its exterior surface"

"It is impossible to begin to learn that which one thinks one already knows"

"A lawyer without history or literature is a mechanic, a mere working mason; if he possesses some knowledge of these, he may venture to call himself an architect"

"I don't know which is more discouraging, literature or chickens"

"The decline of literature indicates the decline of a nation"

"The only way of finding the limits of the possible is by going beyond them into the impossible"

"Nothing is impossible to a willing heart"

"The word impossible is not in my dictionary"

"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair"