“The greatest mystery about a human being is not his reaction to sex or praise, but the manner in which he contrives to put in twenty-four hours a day. It is this which puzzles the longshoreman about the clerk, the Londoner about the bushman.”

“…And it was about four or five hours later that Alice — Remember Alice? It's a song about Alice.”

“Day, n. A period of twenty-four hours, mostly misspent.”

“Manners are about imagination, ultimately. They are about imagining being the other person.”

“Sex in space is not about going somewhere else to have sex; it's ultimately about expanding beyond our immediate neighborhood, into a Universe to which we belong.”

“There is a mystery about this which stimulates the imagination; where there is no imagination there is no horror.”

“The greatest challenge of the day is: how to bring about a revolution of the heart, a revolution which has to start with each one of us?”

“The most successful people have the same twenty-four hours in a day that you do.”

“It is well known that I am available twenty-four hours a day to women astronomers.”

“Lack of direction, not lack of time, is the problem. We all have twenty-four hour days.”