When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion.
Carl SaganThe 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 donโt like that statement, but few can argue with it.
Carl SaganOur intelligence is imperfect, surely, and newly arisen; the ease with which it can be sweet-talked, overwhelmed, or subverted by other hardwired propensities - sometimes themselves disguised as the cool light of reason - is worrisome.
Carl SaganAbsolute certainty will always elude us. We will always be mired in error. The most each generation can hope for is to reduce the error. . . .
Carl SaganThe near side of a galaxy is tens of thousands of light-years closer to us than the far side; thus we see the front as it was tens of thousands of years before the back. But typical events in galactic dynamics occupy tens of millions of years, so the error in thinking of an image of a galaxy as frozen in one moment of time is small.
Carl Sagan