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  • Carl Sagan Quotes   592
  • We are prodding, challenging, seeking contradictions or small, persistent residual errors, proposing alternative explanations, encouraging heresy. We give our highest rewards to those who convincingly disprove established beliefs.
    • 5 years ago



    Tags : Carl Sagan Quotes , Errors Quotes , Giving Quotes
  • A central lesson of science is that to understand complex issues (or even simple ones), we must try to free our minds of dogma and to guarantee the freedom to publish, to contradict, and to experiment. Arguments from authority are unacceptable.
    • 5 years ago



    Tags : Carl Sagan Quotes , Freedom Quotes , Science Quotes
  • The vast distances that separate the stars are providential. Beings and worlds are quarantined from one another. The quarantine is lifted only for those with sufficient self-knowledge and judgment to have safely traveled from star to star.
    • 5 years ago



    Tags : Carl Sagan Quotes , Travel Quotes , Stars Quotes
  • Science arouses a soaring sense of wonder. But so does pseudoscience. Sparse and poor popularizations of science abandon ecological niches that pseudoscience promptly fills. If it were widely understood that claims to knowledge require adequate evidence before they can be accepted, there would be no room for pseudoscience.
    • 5 years ago



    Tags : Carl Sagan Quotes , Doe Quotes , Pseudoscience Quotes
  • Teller contended, not implausibly, that hydrogen bombs keep the peace, or at least prevent thermonuclear war, because the consequences of warfare between nuclear powers are now too dangerous. We haven't had a nuclear war yet, have we? But all such arguments assume that the nuclear-armed nations are and always will be, without exception, rational actors, and that bouts of anger and revenge and madness will never overtake their leaders (or military and secret police officers in charge of nuclear weapons). In the century of Hitler and Stalin, this seems ingenuous.
    • 5 years ago



    Tags : Carl Sagan Quotes , Revenge Quotes , Military Quotes
  • A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself is doomed. We are one planet. One of the great revelations of the age of space exploration is the image of the earth finite and lonely, somehow vulnerable, bearing the entire human species through the oceans of space and time.
    • 5 years ago



    Tags : Carl Sagan Quotes , Lonely Quotes , War Quotes