"If you’ll forgive me, sir, physics is not politics. You can’t make things happen by trying harder."

“Of course, they had always been observed with some regularity, but that could usually be ascribed to an overabundance of piety or wine or imagination. Take your pick.”

“Why is it that people want so desperately to shake hands with otherworldly beings? That people will even insist that they have seen visitors from Spica hovering above their backyards? In other times it was ghosts and fairies and goblins, and voices in the night. Is the company of our own species so dull that we need to invent the Other? On the other hand, maybe that explains it.”

“It had been his experience that the worst cynics all started out as idealists.”

“The man was either foolish or fearless. Assuming there was a difference.”

“There is, he’d said, an inverse correlation between the amount of power a person has and the level at which his or her mind functions. A person of ordinary intelligence who acquires power, of whatever kind, tends to develop an exaggerated view of his own capabilities. Sycophants gather. There is little or no criticism of decisions. As his ability to disrupt the lives of others advances, these tendencies become stronger. Eventually you end with Louis the Fourteenth, who thinks he’s done a good job for France, although the country he left behind was ruined.”

“If you're paying attention to your wardrobe, Rudy believed, your mind isn’t sufficiently occupied.”