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Carl Sagan Quote - The significance of our lives and our fragile planet is then determined only by our own wisdom and courage.

The significance of our lives and our fragile planet is then determined only by our own wisdom and courage.

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Courage Determination Fragile Live Planet Significance Wisdom

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Marilyn Monroe Paulo Coelho Abraham Lincoln C. S. Lewis Khalil Gibran Charlie Chaplin Gautama Buddha Isaac Newton

Writing is the greatest of human inventions, binding together people, citizens of distant epochs, who never knew one another.
CARL SAGAN

Blind Citizen Distant Greatness Human Invention People Togetherness Writing
Arguments from authority carry little weight, authorities have made mistakes in the past. They will do so again in the future. Perhaps a better way to say it is that in science there are no authorities; at most, there are experts.
CARL SAGAN

Argument Authority Expert Future Mistake Past Weight
Stars are phoenixes, rising from their own ashes.
CARL SAGAN

Ash Rise Science Stars
The absence of evidence is not evidence of absence.
CARL SAGAN

Absence Evidence One Liner
Across the sea of space, the stars are other suns.
CARL SAGAN

Across Sea Space Stars Sun
One of the great commandments of science is: Mistrust arguments from authority.
CARL SAGAN

Argument Authority Command Greatness Science Trust
All civilizations become either spacefaring or extinct.
CARL SAGAN

Civilization Extinct Science Space
We make our world significant by the courage of our questions and the depth of our answers.
CARL SAGAN

Courage Depth Significance World
Stars are phoenixes, rising from their own ashes.
CARL SAGAN

Ash Rise Science Stars
If it can be destroyed by the truth, it deserves to be destroyed by the truth.
CARL SAGAN

Deserve Destroy Justice Science Truth
The universe seems neither benign nor hostile, merely indifferent.
CARL SAGAN

Hostile Indifference Universe
Nature is always more subtle, more intricate, more elegant than what we are able to imagine.
CARL SAGAN

Elegant Imagination Nature Stuble
If I finish a book a week, I will read only a few thousand books in my lifetime, about a tenth of a percent of the contents of the greatest libraries of our time. The trick is to know which books to read.
CARL SAGAN

Book Content Finish Library Lifetime Percent Reading Time Trick Week
We can’t help it. Life looks for life.
CARL SAGAN

Help Life Look Science
We live in a vast and awesome universe in which, daily, suns are made and worlds destroyed, where humanity clings to an obscure clod of rock.
CARL SAGAN

Awesome Cling Destroy Humanity Live Rock Sun Universe Vast World
Somewhere, something incredible is waiting to be known.
CARL SAGAN

Astronomy Incredible Inspirational Science

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