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  • Carl Sagan Quotes   592
  • What distinguishes our species is thought. The cerebral cortex is in a way a liberation. We need no longer be trapped in the genetically inherited behavior patterns of lizards and baboons: territoriality and aggression and dominance hierarchies. We are each of us largely responsible for what gets put in to our brains. For what as adults we wind up caring for and knowing about. No longer at the mercy of the reptile brain we can change ourselves. Think of the possibilities.
    • 5 years ago



    Tags : Carl Sagan Quotes , Caring Quotes , Thinking Quotes
  • Indeed the reasoned criticism of a prevailing belief is a service to the proponents of that belief; if they are incapable of defending it, they are well advised to abandon it. This self-questioning and error-correcting aspect of the scientific method is its most striking property.
    • 5 years ago



    Tags : Carl Sagan Quotes , Errors Quotes , Self Questioning Quotes
  • Whenever our ethnic or national prejudices are aroused, in times of scarcity, during challenges to national self esteem or nerve, when we agonize about our diminished cosmic place and purpose, or when fanaticism is bubbling up around us - then, habits of thought familiar from ages past reach for the controls.
    • 5 years ago



    Tags : Carl Sagan Quotes , Self Esteem Quotes , Past Quotes
  • One of the reasons for its success is that science has a built-in, error-correcting machinery at its very heart. Some may consider this an overbroad characterization, but to me every time we exercise self-criticism, every time we test our ideas against the outside world, we are doing science. When we are self-indulgent and uncritical, when we confuse hopes and facts, we slide into pseudoscience and superstition.
    • 5 years ago



    Tags : Carl Sagan Quotes , Heart Quotes , Exercise Quotes
  • Science is a way of thinking much more than it is a body of knowledge. Its goal is to find out how the world works, to seek what regularities there may be, to penetrate to the connections of things-from subatomic particles, which may be the constituents of all matter, to living organisms, the human social community, and thence to the cosmos as a whole.
    • 5 years ago



    Tags : Carl Sagan Quotes , Science Quotes , Thinking Quotes
  • Eratosthenes's only tools were sticks, eyes, feet, and brains; plus a zest for experiment. With those tools he correctly deduced the circumference of the Earth, to high precision, with an error of only a few percent. That's pretty good figuring for 2200 years ago.
    • 5 years ago



    Tags : Carl Sagan Quotes , Eye Quotes , Errors Quotes
  • If God is omnipotent and omniscient, why didn't he start the universe out in the first place so it would come out the way he wants? Why's he constantly repairing and complaining? No, there's one thing the Bible makes clear: The biblical God is a sloppy manufacturer. He's not good at design, he's not good at execution. He'd be out of business, if there was any competition.
    • 5 years ago



    Tags : Carl Sagan Quotes , Biblical Quotes , Design Quotes
  • If intelligence is our only edge, we must learn to use it better, to shape it, to understand its limitations and deficiencies -- to use it as cats use stealth, as katydids use camouflage -- to make it the tool of our survival.
    • 5 years ago



    Tags : Carl Sagan Quotes , Cat Quotes , Survival Quotes
  • Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after the other, with the same female), we might guess that promiscuous societies were uncommon in the immediate human past.
    • 5 years ago



    Tags : Carl Sagan Quotes , Past Quotes , Men Quotes