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"Often, superstition and injustice are imposed by the same ecclesiastical and secular authorities, working hand in glove. It is no surprise that political revolutions, scepticism about religion, and the rise of science might go together."
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"The commonplace books of the old Puritans were invaluable to them. They would never have been able to compile such works as they did if they had not been careful in collecting and arranging their matter under different heads."

"The only lesson you can learn from history is that it repeats itself."

"Well, for us, in history where goodness is a rare pearl, he who was good almost takes precedence over he who was great."

"Robbing people of their actual history is the same as robbing them of part of themselves. It's a crime."Fuka-Eri thought about that for a moment.Tengo went on, "Our memory is made up of our individual memories and our collective memories. The two are intimately linked. And history is our collective memory. If our collective memory is taken from us - is rewritten - we lose the ability to sustain our true selves."

"It is notorious that the news of the Emancipation Proclamation was kept from the people of Texas and not celebrated until 'Juneteenth'. There may be those in Texas now who believe they can insulate their state-a state that had its own courageous revolution-from the news of evolution and from the writing in 1786 of a Constitution that refuses to mention religion except when demarcating and limiting its role in the public square. But we promise them today that they will join their fore-runners in the flat-earth community, and in the mad clerical clique of those who believed that the sun revolved around the earth. Yes, they will be in schoolbooks-as a joke on the epic scale of William Jennings Bryan. We shall be fair, and take care to ensure that their tale is told."

"Many if not most slaves would have each readily jumped, and many if not most slaves would each readily jump, at the opportunity to be a master, if such an opportunity presents or had presented itself."

"Mr. Charles Dickens was serializing his novel Oliver Twist; Mr. Draper had just taken the first photograph of the moon, freezing her pale face on cold paper; Mr. Morse had recently announced a way of transmitting messages down metal wires. Had you mentioned magic or Faerie to any of them, they would have smiled at you disdainfully, except, perhaps for Mr. Dickens, at the time a young man, and beardless. He would have looked at you wistfully."
Explore more quotes by Carl Sagan

"An atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God. I know of no such compelling evidence. Because God can be relegated to remote times and places and to uptime causes, we would have to know a great deal more about the Universe than we do now to be sure that no such God exists. To be certain of the existence of God and you be certain of the nonexistence of God seem to me to be the confident extremes in a subject so riddled with doubt and uncertainty as to inspire very little confidence indeed."

"We are all flawed and creatures of our times. Is it fair to judge us by the unknown standards of the future?"

"And despite the insignificance of the instant we have so far occupied in cosmic time, it is clear that what happens on and near Earth at the beginning of the second cosmic year will depend very much on the scientific wisdom and the distinctly human sensitivity of mankind."

"[In] everyday life, it is very rare that we are confronted with new facts about events of long ago. Our memories are almost never challenged. They can, instead, be frozen in place, no matter how flawed they are, or become a work in continual artistic revision."

"Neuroanatomy, political history, and introspection all offer evidence that human beings are quite capable of resisting the urge to surrender to every impulse of reptilian core of brain."

"You squeeze the eyedropper, and a drop of pond water drips out onto the microscope stage. You look at the projected image. The drop is full of life - strange beings swimming, crawling, tumbling; high dramas of pursuit and escape, triumph and tragedy. This is a world populated by beings far more exotic than in any science fiction movie..."

"A typical chromosomal DNA molecule in a human being is composed of about five billion pairs of nucleotides. But since there are four different kinds of nucleotides, the number of bits of information in DNA is four times the number of nucleotide pairs. Thus if a single chromosome has five billion (5 X 10^9) nucleotides, it contains twenty billion (2 X 10^10) bits of information. We also see that if more than some tens of billions (several times 10^10) of bits of information are necessary for human survival, extragenetic systems will have to provide them: the rate of development of genetic systems is so slow that no source of such additional biological information can be sought in the DNA."

"We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster. We might get away with it for a while, but sooner or later this combustible mixture of ignorance and power is going to blow up in our faces."
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