"It had often been said that the only thing that could unite Humankind was a threat from space. Whether Lucifer was a threat, no one knew; but it was certainly a challenge. And that, as it turned out, was enough." Chapter 3, p. 13

"Like most families, it was not always a peaceful one, but its disputes no longer threatened the entire planet. The second - and last - nuclear war saw the use in combat of no more bombs than the first: precisely two. And though the kilotonnage was greater, the casualties were far fewer, as both were used against sparsely populated oil installations." Chapter 3, p. 15

"Afrikaans is one of the world's best languages in which to curse; even when spoken politely, it can bruise innocent bystanders." Chapter 11, p. 54

"It is a good principle in science not to believe any 'fact' - however well attested - until it fits...