"The problem is, only a few people get to be scientists. You see the dilemma? Given the choice between a truth they can appreciate and a lie they can live, most people will take you-know-what."

“Let’s just hope that gravity isn’t as heavy as it used to be...”

“He was a devout believer in the second chance. To the man who asked, “What’s the point of closing the barn door after the horse has been stolen?” Murray would answer, “The point is that the door is now closed.”

“Be sure to convict that chucklehead. He thinks a country’s Christianity is measured by the size of its thermonuclear arsenal.”

“Much as I hate to admit it, humanity will get along perfectly well without me. Any species that could invent the twentieth century entirely on its own doesn’t need a Prince of Darkness.”

“Imagine that a team of neuroscientists has just unveiled a technology that lets a person remove all trace of some terrible experience from his brain. Under what conditions, if any, would you use it? What might it be like to go through life knowing you’d once suffered an ordeal so dreadful that it demanded radical excision? How long could you endure this strange affirmative ignorance, this lost access to the unspeakable, without becoming neurotic, or even slightly mad? In the long run, might you not decide that such circumscribed amnesia was worse than whatever memory you’d felt compelled to erase?”

“Often Burne found himself saying, “I don’t think you would make a very good soldier,” and with grating predictability he heard that he wouldn’t make a very good pacifist.”