Carl Sagan Quotes, Truth Quotes, Book Quotes

'In his celebrated book, 'On Liberty', the English philosopher John Stuart Mill argued that silencing an opinion is "a peculiar evil." If the opinion is right, we are robbed of the "opportunity of exchanging error for truth"; and if it's wrong, we are deprived of a deeper understanding of the truth in its "collision with error." If we know only our own side of the argument, we hardly know even that: it becomes stale, soon learned by rote, untested, a pallid and lifeless truth.'

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The sky calls to us. If we do not destroy ourselves, we will one day venture to the stars.

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Not explaining science seems to me perverse. When you're in love, you want to tell the world.

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We are a way for the cosmos to know itself.

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The fact is that far more crime and child abuse has been committed by zealots in the name of God, Jesus and Mohammed than has ever been committed in the name of Satan. Many people don’t like that statement, but few can argue with it.

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By looking far out into space we are also looking far back into time, back toward the horizon of the universe, back toward the epoch of the Big Bang.

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Maxwell's Equations have had a greater impact on human history than any ten presidents.

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Books break the shackles of time, proof that humans can work magic.

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There is never only ONE of anything in nature.

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Our perceptions are fallible. We sometimes see what isn't there. We are prey to optical illusions. Occasionally we hallucinate. We are error-prone.

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Who will speak for Planet Earth?

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How smart does a chimpanzee have to be before killing him constitutes murder?

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Other things being equal, it is better to be smart than to be stupid.

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The evidence, so far at least and laws of Nature aside, does not require a Designer. Maybe there is one hiding, maddeningly unwilling to be revealed.

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The candle flame gutters. Its little pool of light trembles. Darkness gathers. The demons begin to stir.

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The cosmos is all there is, all there ever was, and all there ever will be.

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In our time, we have sifted the sands of Mars, we have established a presence there, we have fulfilled a century of dreams!

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We have entered, almost without noticing, an age of exploration and discovery unparalleled since the Renaissance.

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Demon mean knowledge in Greek, especially about the material world. Science means knowledge in Latin. A jurisdictional dispute is exposed, even if we look no further

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We on Earth have just awakened to the great oceans of space and time from which we have emerged.

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