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Carl Sagan Quotes about Truth

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The words question and quest are cognates. Only through inquiry can we discover truth.

The words "question" and "quest" are cognates. Only through inquiry can we discover truth.

Carl Sagan
Truth, Inquiry, Quests
Carl Sagan (2011). “Broca's Brain: Reflections on the Romance of Science”, p.365, Ballantine Books

'In his celebrated book, 'On Liberty', the English philosopher John Stuart Mill argued that silencing an opinion is "a peculiar evil." If the opinion is right, we are robbed of the "opportunity of exchanging error for truth"; and if it's wrong, we are deprived of a deeper understanding of the truth in its "collision with error." If we know only our own side of the argument, we hardly know even that: it becomes stale, soon learned by rote, untested, a pallid and lifeless truth.'

Carl Sagan
Truth, Book, Opportunity
Carl Sagan (2011). “The Demon-Haunted World: Science as a Candle in the Dark”, p.550, Ballantine Books

Who is more humble? The scientist who looks at the universe with an open mind and accepts whatever the universe has to teach us, or somebody who says everything in this book must be considered the literal truth and never mind the fallibility of all the human beings involved?

Carl Sagan
Inspirational, Life, Truth
Carl Sagan, Tom Head (2006). “Conversations with Carl Sagan”, p.145, Univ. Press of Mississippi

History is full of people who out of fear, or ignorance, or lust for power has destroyed knowledge of immeasurable value which truly belongs to us all. We must not let it happen again.

Carl Sagan
Truth, Ignorance, People

There are many hypotheses in science which are wrong. That’s perfectly all right: it’s the aperture to finding out what’s right. Science is a self-correcting process.

Carl Sagan
Truth, Self, Aperture

Our 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 Sagan
Sweet, Truth, Light
Carl Sagan, Ann Druyan (2011). “Shadows of Forgotten Ancestors”, p.407, Ballantine Books

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