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Carl Sagan Quote - The absence of evidence is not evidence of absence.

The absence of evidence is not evidence of absence.

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Absence Evidence One Liner

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

One of the greatest gifts adults can give – to their offspring and to their society – is to read to children.
CARL SAGAN

Adult Children Gift Reading Society Spring
Nature is unsentimental. Death is built in.
CARL SAGAN

Build Death Nature Sentimental Truth
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
We can’t help it. Life looks for life.
CARL SAGAN

Help Life Look Science
The visions we offer our children shape the future.
CARL SAGAN

Children Future Inspirational Ofer Shape Vision
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
Knowing a great deal is not the same as being smart; intelligence is not information alone but also judgement, the manner in which information is coordinated and used.
CARL SAGAN

Alone Coordinate Deal Greatness Information Intelligence Judgement Knowledge Manner Smart Used
You have to know the past to understand the present.
CARL SAGAN

Deep Inspirational One Liner Past Present Understand
The universe is not required to be in perfect harmony with human ambition.
CARL SAGAN

Ambition Harmony Human Perfection Requirement Universe
A book is made from a tree. It is an assemblage of flat, flexible parts (still called “leaves”) imprinted with dark pigmented squiggles.
CARL SAGAN

Assemble Book Leaf Print Tree
I’ve always thought an agnostic is an atheist without the courage of his convictions.
CARL SAGAN

Atheist Conviction Courage
We all have a thirst for wonder. It’s a deeply human quality. Science and religion are both bound up with it.
CARL SAGAN

Bound Human Quality Religion Science Thirist Wonder
Other things being equal, it is better to be smart than to be stupid.
CARL SAGAN

Equality Inspirational Smart Stupidity
Except in pure mathematics, nothing is known for certain (although much is certainly false).
CARL SAGAN

Certain Except False Mathematics Pure
Perhaps the depth of love can be calibrated by the number of different selves that are actively involved in a given relationship.
CARL SAGAN

Depth Different Giving Involvement Love Number Perhaps Relationship
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.
CARL SAGAN

Awake Citizen Deserve Mind Species Understand Work World
The Earth is a very small stage in a vast cosmic arena.
CARL SAGAN

Arena Cosmic Earth Stage Vast
One of the great commandments of science is: Mistrust arguments from authority.
CARL SAGAN

Argument Authority Command Greatness Science Trust
To live in the hearts we leave behind is to live forever.
CARL SAGAN

Break Up Couple Deep Forever Heart Leaving Live Love
All civilizations become either spacefaring or extinct.
CARL SAGAN

Civilization Extinct Science Space
The truth may be puzzling. It may take some work to grapple with. It may be counterintuitive. It may contradict deeply held prejudices. It may not be consonant with what we desperately want to be true. But our preferences do not determine what’s true.
CARL SAGAN

desperatel Determination Preference Prejudice Puzzle True Truth Want Work
Be grateful everyday for the brief but magnificent opportunity that life provides.
CARL SAGAN

Inspirational Life Magnificent Opportunity Positive Provide Thankful
The universe is a pretty big place. If it’s just us, seems like an awful waste of space.
CARL SAGAN

Awful Place Pretty Science Space Universe Waste
Books are like seeds. They can lie dormant for centuries and then flower in the most unpromising soil.
CARL SAGAN

Book Century Flower Lie Promise Seed Soil
The Earth is the only world known so far to harbor life.
CARL SAGAN

Earth Harbor Life
Don’t judge everyone else by your own limited experience.
CARL SAGAN

Experience Judgement Life Limitation
Every star may be a sun to someone.
CARL SAGAN

Deep One Liner Stars Sun

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