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" The universe is not required to be in perfect harmony with human ambition. "
Carl Sagan
Ambition
Perfect
Universe
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" We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology. "
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" The brain is like a muscle. When it is in use we feel very good. Understanding is joyous. "
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" It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring. "
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" Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. "
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" I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students. "
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" 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 up stories about how the world was hatched from a cosmic egg or created after the mating of cosmic deities or by some fiat of a powerful being. "
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" We are not without empathetic terror when we open Pascal's 'Pensees' and read, 'I am the great silent spaces between worlds.' "
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" We are the representatives of the cosmos; we are an example of what hydrogen atoms can do, given 15 billion years of cosmic evolution. "
Carl Sagan
Evolution
Atoms
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" The boundary between space and the earth is purely arbitrary. And I'll probably always be interested in this planet - it's my favorite. "
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Planet
Favorite
Earth
" Extinction is the rule. Survival is the exception. "
Carl Sagan
Exception
Rule
Extinction
" 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 - well, we've got more than 25,000! "
Carl Sagan
Destroy
Need
You
" The professed function of the nuclear weapons on each side is to prevent the other side from using their nuclear weapons. If that's all it is, then we've gotta as: how many nuclear weapons do you need to do that? "
Carl Sagan
Nuclear Weapons
You
Side
" Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense. "
Carl Sagan
Deep
Which
Religion
" For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring. "
Carl Sagan
Far
Universe
Better
" 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. "
Carl Sagan
Will
Up
Save
" We're in very bad trouble if we don't understand the planet we're trying to save. "
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Understand
Trouble
Bad
" 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. "
Carl Sagan
Value
American
Technology
" Imagination will often carry us to worlds that never were. But without it we go nowhere. "
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Go
Will
Never
" For small creatures such as we the vastness is bearable only through love. "
Carl Sagan
Only
Small
Through
" 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. "
Carl Sagan
Night
Know
I Can
" If you wish to make an apple pie from scratch, you must first invent the universe. "
Carl Sagan
You
Pie
Wish
" 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. But they also laughed at Bozo the Clown. "
Carl Sagan
Columbus
Brothers
Clown
" 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. "
Carl Sagan
Stars
Space
Seem
" There is a wide, yawning black infinity. In every direction, the extension is endless; the sensation of depth is overwhelming. And the darkness is immortal. Where light exists, it is pure, blazing, fierce; but light exists almost nowhere, and the blackness itself is also pure and blazing and fierce. "
Carl Sagan
Direction
Black
Darkness
" The universe seems neither benign nor hostile, merely indifferent. "
Carl Sagan
Nor
Indifferent
Universe
" The Earth is a very small stage in a vast cosmic arena. "
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Cosmic
Small
Stage
" I've written a number of books that have to do with the evolution of humans, human intelligence, human emotions. "
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Human
Intelligence
Evolution
" 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 history turns out. "
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Death
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" It's been said that astronomy is a humbling and, I might add, a character-building experience. "
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Add
Said
Experience
" Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people. "
Carl Sagan
Lost
Live
People