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There were timelines branching and branching, a mega-universe of universes, millions more every minute. Billions? Trillions? The universe split every time someone made a decision. Split, so that every decision ever made could go both ways. Every choice made by every man, woman, and child was reversed in the universe next door.Larry Niven
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Mother Nature doesn't care if you're having fun.Larry Niven
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Never fire a laser at a mirror.Larry Niven
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Spray a book with insect spray, drop it in a bag, add some mothballs and seal it. Put it in another bag and seal it. Another. The packages piled up on the floor, each a book sealed in four plastic envelopes.Larry Niven
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Fear is the brother of hate.Larry Niven
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One mark of a good officer, he remembered, was the ability to make quick decisions. If they happen to be right, so much the betterLarry Niven
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It's very difficult for a black man to get out of South-Central Los Angeles, and get out civilized.... The only men I know who have escaped, all began reading Robert Heinlein at age ten.Larry Niven
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Psi and/or magical powers, if real, are nearly useless.Larry Niven
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The gods do not protect fools. Fools are protected by more capable fools.Larry Niven
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Never tell a computer to forget it.Larry Niven
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I myself have dreamed up a structure intermediate between Dyson spheres and planets. Build a ring 93 million miles in radius - one Earth orbit - around the sun. If we have the mass of Jupiter to work with, and if we make it a thousand miles wide, we get a thickness of about a thousand feet for the base. And it has advantages. The Ringworld will be much sturdier than a Dyson sphere. We can spin it on its axis for gravity. A rotation speed of 770 m/s will give us a gravity of one Earth normal. We wouldn't even need to roof it over. Place walls one thousand miles high at each edge, facing the sun. Very little air will leak over the edges. Lord knows the thing is roomy enough. With three million times the surface area of the Earth, it will be some time before anyone complains of the crowding.Larry Niven
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The value of a thing is what that thing will bring. -Legal MaximLarry Niven
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Ethics change with technology.Larry Niven
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Each nugget of information was fascinating. The world was full of new-found marvels and he wanted to share the excitement with everybody. They all did. They had a certain sense. It wasn't a sense of ennui or cynicism. It was. A sense of wonder. That was it. A sense of wonder, in the fine old original meaning of the word. They wondered at their world. Because when you did that, everything was wonder-full.Larry Niven
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On a world built to ordered specification, there was no logical reason for such a mountain to exist. Yet every world should have at least one unclimbable mountain.Larry Niven
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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!Larry Niven
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The human species really could have faced global thermonuclear war. During seventy years of Cold War we grew used to it.Larry Niven
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Building one space station for everyone was and is insane: we should have built a dozen.Larry Niven
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The dinosaurs became extinct because they didn't have a space program.Larry Niven
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We need to take command of the solar system to gain that wealth, and to escape the sea of paper our government is becoming, and for some decent chance of stopping a Dinosaur Killer asteroid.Larry Niven
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I'd visit the near future, close enough that someone might want to talk to Larry Niven and can figure out the language; distant enough to get me decent medical techniques and a ticket to the Moon.Larry Niven