All Quotes, Carl Sagan

29 Carl Sagan Quotes And Sayings

Carl Edward Sagan was an American astronomer, cosmologist, astrophysicist, astrobiologist, author, science popularizer, and science communicator in astronomy and other natural sciences. Sagan published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books. Sagan advocated scientific skeptical inquiry and the scientific method, pioneered exobiology and promoted the Search for Extra-Terrestrial Intelligence (SETI). This are 29 beautiful thoughts from the scientist.



1. Extinction is the rule. Survival is the exception.
2. If you wish to make an apple pie from scratch, you must first invent the universe.
3. A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.
4. For small creatures such as we the vastness is bearable only through love.
5. It's been said that astronomy is a humbling and, I might add, a character-building experience.
6. Most of the people that I deal with are human. So I've had a lot of experience with that.
7. We're in very bad trouble if we don't understand the planet we're trying to save.



8. Absence of evidence is not evidence of absence.
9. The universe seems neither benign nor hostile, merely indifferent.
10. The universe is not required to be in perfect harmony with human ambition.
11. I can find in my undergraduate classes, bright students who do not know that the stars rise and set at night, or even that the Sun is a star.
12. 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.
13. The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies was made in the interiors of collapsing stars. We are made of star stuff.
14. Extraordinary claims require extraordinary evidence.
15. Imagination will often carry us to worlds that never were, but without it we go nowhere.
16. It pays to keep an open mind, but not so open your brains fall out.
17. We can judge our progress by the courage of our questions and the depth of our answers, our willingness to embrace what is true rather than what feels good.
18. We are like butterflies that flutter for a day and think it is forever.
19. The universe is a pretty big place. If it’s just us, seems like an awful waste of space.
20. It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.



21. The universe seems neither benign nor hostile, merely indifferent.
22. A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.
23. 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.
24. The universe is not required to be in perfect harmony with human ambition.
25. When you make the finding yourself – even if you’re the last person on Earth to see the light – you’ll never forget it.
26. The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
27. We’ve arranged a civilization in which most crucial elements profoundly depend on science and technology.
28. If you wish to make an apple pie from scratch, you must first invent the universe.
29. Absence of evidence is not evidence of absence.

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