Science is a way to call the bluff of those who only pretend to knowledge. It is a bulwark against mysticism against superstition against religion misapplied to where it has no business being.
Carl Sagan
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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 selfknowledge and judgment to have safely traveled from star to star.
- Carl Sagan -
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When Kepler found his long-cherished belief did not agree with the most precise observation, he accepted the uncomfortable fact. He preferred the hard truth to his dearest illusions; that is the heart of science.
- Carl Sagan -