“Otto would pull the trigger at the slightest provocation and you, Michael, would agonize aver its morality even if your life were threatened. I'm the tiebreaker.”

“There is no reason to assume that the universe has the slightest interest in intelligence—or even in life. Both may be random accidental by-products of its operations like the beautiful patterns on a butterfly's wings. The insect would fly just as well without them.”

“Even more alarming were persistent rumors that someone had smuggled an Emotion Amplifier on board 'Mentor'. The so-called joy machines were banned on all planets, except under strict medical control; but there would always be people to whom reality was not good enough, and who would want to try something better.”

“In this universe the night was falling; the shadows were lengthening towards an east that would not know another dawn. But elsewhere the stars were still young and the light of morning lingered; and along the path he once had followed, Man would one day go again.”

“I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.”

“He left the unspoken question hanging in the air. How did one annoy a two- kilometre-long black rectangular slab? And just what form would its disapproval take”

“In my life I have found two things of priceless worth - learning and loving. Nothing else - not fame, not power, not achievement for its own sake - can possible have the same lasting value. For when your life is over, if you can say 'I have learned' and 'I have loved,' you will also be able to say 'I have been happy.”