The limits of the possible can only be defined by going beyond them into the impossible.
Arthur C. ClarkeThere's no real objection to escapism, in the right places... We all want to escape occasionally. But science fiction is often very far from escapism, in fact you might say that science fiction is escape into reality... It's a fiction which does concern itself with real issues: the origin of man; our future. In fact I can't think of any form of literature which is more concerned with real issues, reality.
Arthur C. ClarkeThe phenomenon of UFO doesn't say anything about the presence of intelligence in space. It just shows how rare it is here on the earth.
Arthur C. Clarke