Carl Sagan

“The universe seems neither benign nor hostile, merely indifferent.”

“All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year. Not all bits have equal value.”

“I can find in my undergraduate classes, bright students who do not know that the stars rise and set at night, or even that the Sun is a star.”

“But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright Brothers...”

“Imagination will often carry us to worlds that never were. But without it we go nowhere.”

“Our posturings, our imagined self-importance, the delusion that we have some privileged position in the universe, are challenged by this point of pale light. Our planet is a lonely speck in...”

“You probably don't need more weapons than what's required to destroy every city on earth. There's only 2,300 cities. So, the United States, by that criteria, only needs 2,300 nuclear weapons...”

“The dangers of not thinking clearly are much greater now than ever before. It's not that there's something new in our way of thinking - it's that credulous and confused thinking can be much...”

“We hunger to understand, so we invent myths about how we imagine the world is constructed - and they're, of course, based upon what we know, which is ourselves and other animals. So we make...”

“Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how hist...”

“It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.”

“For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.”

“We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.”

“If we long to believe that the stars rise and set for us, that we are the reason there is a Universe, does science do us a disservice in deflating our conceits?”

“Even these stars, which seem so numerous, are as sand, as dust - or less than dust - in the enormity of the space in which there is nothing.”

“In our obscurity - in all this vastness - there is no hint that help will come from elsewhere to save us from ourselves. It is up to us.”

“We are not without empathetic terror when we open Pascal's 'Pensees' and read, 'I am the great silent spaces between worlds.'”

“I've written a number of books that have to do with the evolution of humans, human intelligence, human emotions.”

“Extinction is the rule. Survival is the exception.”

“When you make the finding yourself - even if you're the last person on Earth to see the light - you'll never forget it.”