Carl Sagan Quotes

“The truth may be puzzling or counterintuitive. It may contradict deeply held beliefs. Experiment is how we get a handle on it.”

― Carl Sagan, The Demon-Haunted World

topic:truth

“it is undesirable to believe a proposition when there is no ground whatever for supposing it true.”

― Carl Sagan, Contact

topic:truth belief

“if we've been bamboozled long enough, we tend to reject any evidence of the bamboozle. We're no longer interested in finding out the truth. The bamboozle has captured us. It's simply too painful to acknowledge, even to ourselves, that we've been...”

― Carl Sagan, The Demon-Haunted World

topic:truth

“The Hindu religion is the only one of the world’s great faiths dedicated to the idea that the Cosmos itself undergoes an immense, indeed an infinite, number of deaths and rebirths. It is the only religion in which the time scales correspond, no...”

― Carl Sagan, Cosmos

topic:time religion

“Writing is perhaps the greatest of human inventions, binding together people, citizens of distant epochs, who never knew one another. Books break the shackles of time, proof that humans can work magic.”

― Carl Sagan, Cosmos

topic:time writing books

“By looking far out into space we are also looking far back into time, back toward the horizon of the universe, back toward the epoch of the Big Bang.”

― Carl Sagan, Cosmos

topic:time universe

“You have to know the past to understand the present.”

― Carl Sagan, Cosmos

topic:knowledge understanding past present

“Knowing a great deal is not the same as being smart; intelligence is not information alone but also judgment, the manner in which information is coordinated and used.”

― Carl Sagan, Cosmos

topic:knowledge judgement

“It does no harm to the romance of the sunset to know a little bit about it.”

― Carl Sagan, Pale Blue Dot

topic:knowledge romance

“the history of science . . . teaches that the most we can hope for is successive improvement in our understanding, learning from our mistakes, an asymptotic approach to the Universe, but with the proviso that absolute certainty will always elude us.”

― Carl Sagan, The Demon-Haunted World

topic:knowledge science

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