Here are some of his quotes:
"The greatest tragedy in mankind's entire history may be the hijacking of morality by religion."
"How inappropriate to call this planet Earth, when clearly it is Ocean."
"I don't believe in astrology; I'm a Sagittarius and we're skeptical. "
Clarke's private life remains a mystery. He was married briefly to an American, Marilyn Mayfield, now dead, whom he met while diving in Florida in the 50s. Asked whether he is gay, Clarke always gives the same puckish pro forma answer: "No, merely cheerful." The answer, presumably, lies in the "Clarkives" - a vast collection of his manuscripts and private writings, to be published 50 years after his death.