Carl Sagan quotes

Carl Sagan
Carl Sagan

Carl Edward Sagan (9 November 1934 – 20 December 1996) was an American astronomer astronomer, cosmologist, astrophysicist, astrobiologist, author, science popularizer, and science communicator in astronomy and other natural sciences and popular science writer. He published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books. Sagan is known for many of his popular science books.

Carl Sagan quotes
Carl Sagan quotes

“Somewhere, something incredible is waiting to be known.”

“Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.”

“Science is not only compatible with spirituality; it is a profound source of spirituality.”

“The sky calls to us. If we do not destroy ourselves, we will one day venture to the stars.”

“Imagination will often carry us to worlds that never were, but without it we go nowhere.”

“We make our world significant by the courage of our questions and by the depth of our answers.”

“The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.”

“Extraordinary claims require extraordinary evidence.”

Carl Sagan quotes
Carl Sagan quotes

“One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time.”

“If you wish to make an apple pie from scratch, you must first invent the universe.”

“History is full of people who out of fear or ignorance or the lust for power have destroyed treasures of immeasurable value which truly belong to all of us. We must not let it happen again.”

“Matter is composed chiefly of nothing.”

“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?”

“For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.”

“Nobody listens to mathematicians. ”

“The fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.”

“For small creatures such as we the vastness is bearable only through love.”

“We are a way for the cosmos to know itself.”

“The universe is a pretty big place. If it’s just us, seems like an awful waste of space.”

“It pays to keep an open mind, but not so open your brains fall out.”

“The absence of evidence is not the evidence of absence.”

“Science is a way of thinking much more than it is a body of knowledge.”

“We wish to pursue the truth no matter where it leads. But to find the truth, we need imagination and skepticism both.”

There are many hypotheses in science that are wrong. That’s perfectly alright; it’s the aperture to finding out what’s right. Science is a self-correcting process. To be accepted, new ideas must survive the most rigorous standards of evidence and scrutiny.

“War is murder writ large.”

“I would love to believe that when I die I will live again, that some thinking, feeling, remembering part of me will continue. But as much as I want to believe that, and despite the ancient and worldwide cultural traditions that assert an afterlife, I know of nothing to suggest that it is more than wishful thinking.”

“We are like butterflies who flutter for a day and think it is forever.”

“You’re an interesting species. An interesting mix. You’re capable of such beautiful dreams, and such horrible nightmares. You feel so lost, so cut off, so alone, only you’re not. See, in all our searching, the only thing we’ve found that makes the emptiness bearable, is each other.”

“The nuclear arms race is like two sworn enemies standing waist deep in gasoline, one with three matches, the other with five.”

“Extinction is the rule. Survival is the exception.”

“Look, all I’m asking is for you to just have the tiniest bit of vision. You know, to just sit back for one minute and look at the big picture…”

“Superstition is marked not by its pretension to a body of knowledge but by its method of seeking truth.”

“Science is, at least in part, informed worship.”


    1. I am a huge Feynman fan, thank you for the link. 🙂


  1. really appreciate the time you took to pull these quotes together. Sagan was an inspiration and, hopefully, continues to be one.


  2. WOW! This is like finding a great treasure trove of Carl Sagan quotes. Loved this understanding nature video by Feynman. Love him ardently as much as Sagan. 🙂 A big Thanks for both.


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