Perhaps, as some wit remarked, the best proof that there is Intelligent Life in Outer Space is the fact it hasn't come here. Well, it can't hide forever - one day we will overhear it.
Arthur C. ClarkeAttempting to define science fiction is an undertaking almost as difficult, though not so popular, as trying to define pornography... In both pornography and SF, the problem lies in knowing exactly where to draw the line.
Arthur C. ClarkeMy favorite definition of an intellectual: 'Someone who has been educated beyond his/her intelligence'.
Arthur C. ClarkeSpace can be mapped and crossed and occupied without definable limit; but it can never be conquered.
Arthur C. ClarkeA precondition for being a science fiction writer other than an interest in the future is that, an interest - at least an understanding of science, not necessarily a science degree but you must have a feeling for the science and its possibilities and its impossibilities, otherwise you're writing fantasy. Now, fantasy is also fine, but there is a distinction, although no one's ever been able to say just where the dividing lines come.
Arthur C. Clarke