You have to know the past to understand the present.
CARL SAGANFor me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.
More Carl Sagan Quotes
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Except in pure mathematics, nothing is known for certain (although much is certainly false).
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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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Any faith that admires truth, that strives to know God, must be brave enough to accommodate the universe.
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A galaxy is composed of gas and dust and stars – billions upon billions of stars. Every star may be a sun to someone.
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Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.
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We all have a thirst for wonder. It’s a deeply human quality. Science and religion are both bound up with it.
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All over the world there are enormous numbers of smart, even gifted, people who harbor a passion for science.
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Imagination will often carry us to worlds that never were, but without it we go nowhere.
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We are all stardust.
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You are worth about 3 dollars worth in chemicals.
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Knowing a great deal is not the same as being smart; intelligence is not information alone but also judgement, the manner in which information is coordinated and used.
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Not all birds can fly. What separates the flyers from the walkers is the ability to take off.
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Science is a way of thinking much more than it is a body of knowledge.
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There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths.
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Stars are phoenixes, rising from their own ashes.
CARL SAGAN