30 Famous Carl Sagan Quotes

Carl Sagan was an American astronomer, cosmologist, astrophysicist, astrobiologist, author, and science communicator. Born in 1934, he was well-known for his work in astronomy and popularizing science. He wrote numerous books on science and is credited with coining the term ‘cosmos,’ meaning the universe as a complex and orderly system.

Carl Sagan Quotes

Carl Sagan popular Books


2.Pale Blue Dot: A Vision of the Human Future in Space

3.Broca’s Brain: Reflections on the Romance of Science

4.The Demon-Haunted World: Science as a Candle in the Dark


6.Billions & Billions: Thoughts on Life and Death at the Brink of the Millennium

7.Shadows of Forgotten Ancestors

8.The Varieties of Scientific Experience: A Personal View of the Search for God

9.Dragons of Eden: Speculations on the Evolution of Human Intelligence

Carl Sagan quotes

Carl Sagan left behind a legacy of thought-provoking quotes that are still remembered today. Here are some of the most famous Carl Sagan quotes:

1.”The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate”.

2. “We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology”.

3. “Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people”.

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

5. “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”.

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

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

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

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

10. “In our obscurity – in all this vastness – there is no hint that help will come from elsewhere to save us from ourselves. It is up to us.”

11. “The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.”

12. “It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.”

13. “Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.”

14. “The universe seems neither benign nor hostile, merely indifferent.”

15. “The boundary between space and the earth is purely arbitrary. And I’ll probably always be interested in this planet – it’s my favorite.”

16. “The dangers of not thinking clearly are much greater now than ever before. It’s not that there’s something new in our way of thinking – it’s that credulous and confused thinking can be much more lethal in ways it was never before.”

17. “We are not without empathetic terror when we open Pascal’s ‘Pensees’ and read, ‘I am the great silent spaces between worlds.'”

18. “All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year. Not all bits have equal value.”

19. “We’ve arranged a civilization in which most crucial elements profoundly depend on science and technology.”

20. “Today, we’re still loaded down – and, to some extent, embarrassed – by ancient myths, but we respect them as part of the same impulse that has led to the modern, scientific kind of myth. But we now have the opportunity to discover, for the first time, the way the universe is in fact constructed as opposed to how we would wish it to be constructed.”

21. “We are star stuff harvesting the energy of the Sun”.

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

23. “The universe is not required to be in perfect harmony with human ambition”.

24. “Science is more than a body of knowledge, it’s a way of thinking; a way of skeptically interrogating the universe with a fine understanding of human fallibility”.

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

26. “We’re in very bad trouble if we don’t understand the planet we’re trying to save”.

27. “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”.

28. “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”

29. “We live on an obscure hunk of rock and metal circling a humdrum star in the remotest corner of an obscure galaxy. And yet, we can think great thoughts and attempt to communicate them to others”.

30. “We have begun to contemplate our origins: starstuff pondering the stars; organized collections of ten billion billion billion atoms considering the evolution of matter and galaxies, asking, ‘What is the nature of the universe?’ This is a very special moment”.