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"The suppression of uncomfortable ideasmay be common in religion and politics, but it is not the path to knowledge; it has no placein the endeavor of science."
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"Getting to know who you are is the most essential information that you can find out about yourself."

"You need to know the constituency you belong to...and that is revealed by your constituents. When your constituents are speaking in public and making of stories, your constituency can be "journalism"."

"No one knows it all. Asking questions about the things that you don't know doesn't make you unintelligent. You don't have a million years on earth to make all the mistakes in the world and learn from them. You can learn from better informed people, and save yourself the headaches that come from making too many avoidable mistakes."
Explore more quotes by Carl Sagan

"I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students."

"When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion."

"Billions of years from now our sun, then a distended red giant star, will have reduced Earth to a charred cinder. But the Voyager record will still be largely intact, in some other remote region of the Milky Way galaxy, preserving a murmur of an ancient civilization that once flourished - perhaps before moving on to greater deeds and other worlds - on the distant planet Earth."

"I find these comparisons particularly poignant: life versus death, hope versus fear. Space exploration and the highly mechanized destruction of people use similar technology and manufacturers, and similar human qualities of organization and daring. Can we not make the transition from automated aerospace killing to automated aerospace exploration of the solar system in which we live?"

"As science advances, there seems to be less and less for God to do. It's a big universe, of course, so He, She, or It, could be profitably employed in many places. But what has clearly been happening is that evolving before our eyes has been a God of the Gaps; that is, whatever it is we cannot explain lately is attributed to God. And then after a while, we explain it, and so that's no longer God's realm."

"Let's see if I got this right," she would say to herself. "I've taken an inert gas that's in the air, made it into a liquid, put some impurities in a ruby, attached a magnet, and detected the fires of creation."

"But if they called everything divine which they do not understand, why, there would be no end of divine beings."

"The world is so exquisite with so much love and moral depth, that there is no reason to deceive ourselves with pretty stories for which there's little good evidence. Far better it seems to me, in our vulnerability, is to look death in the eye and to be grateful every day for the brief but magnificent opportunity that life provides."

"Might it be possible at some future time, when neurophysiology has advanced substantially, to reconstruct the memories or insight of someone long dead?...It would be the ultimate breach of privacy."
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