"The danger of asteroid or comet impact is one of the best reasons for getting into space ... I'm very fond of quoting my friend Larry Niven: "The dinosaurs became extinct because they didn't have a space program. And if we become extinct because we don't have a space program, it'll serve us right!"

“If children have interests then education happens.”

“Yet it was the impression that the unknown master has set out to create, Phoenix-like, from the dying embers of a great legend. He had captured, and held for all future ages to see, that beauty whose service is the purpose of life, and it sole justification.”

“The Information Age offers much to mankind, and I would like to think that we will rise to the challenges it presents. But it is vital to remember that information — in the sense of raw data — is not knowledge, that knowledge is not wisdom, and that wisdom is not foresight. But information is the first essential step to all of these.”

“I am unable to distinguish clearly between your religious ceremonies and apparently identical behavior at the sporting and cultural functions you have transmitted to me.”

““Civilization exists,” Crane said, “by geological consent, subject to change without notice.”

“Through long and bitter experience, Rajasinghe had learned never to trust first impressions, but also never to ignore them.”