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Carl Sagan Quote - The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

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

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Brain Feeling Goodness Joy Muscle Understand

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

A galaxy is composed of gas and dust and stars – billions upon billions of stars. Every star may be a sun to someone.
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Compose Dust Galaxy Gas Stars Sun
To live in the hearts we leave behind is to live forever.
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Break Up Couple Deep Forever Heart Leaving Live Love
Science is a way to not fool ourselves.
CARL SAGAN

Fools One Liner Ourselves Science
A book is made from a tree. It is an assemblage of flat, flexible parts (still called “leaves”) imprinted with dark pigmented squiggles.
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Science is not only compatible with spirituality; it is a profound source of spirituality.
CARL SAGAN

Compatible Profound Science Soource Spiritual
An atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God.
CARL SAGAN

Against Atheist Certain Evidence Existence God
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
Except in pure mathematics, nothing is known for certain (although much is certainly false).
CARL SAGAN

Certain Except False Mathematics Pure
We live on a mote of dust suspended in a sunbeam.
CARL SAGAN

Dust Live Sun Suspend
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 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
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
Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.
CARL SAGAN

Cosmic Enough Explore Investigation Nature Ocean Ready Sail Shore Stars Wander
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
I don’t want to believe. I want to know.
CARL SAGAN

Atheist Believe Knowledge Proof Science Want
Avoidable human misery is more often caused not so much by stupidity as by ignorance, particularly our ignorance about ourselves.
CARL SAGAN

Avoid Cause Human Ignorance Misery Ourselves Particular Stupidity
Better the hard truth, I say, than the comforting fantasy.
CARL SAGAN

Comfortable Fantasy Inspirational Truth
Don’t judge everyone else by your own limited experience.
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Experience Judgement Life Limitation
Books permit us to voyage through time, to tap the wisdom of our ancestors.
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Book Permit Time Voyage Wisdom
And you are made of a hundred trillion cells. We are, each of us, a multitude.
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Biology Cell Science
Be grateful everyday for the brief but magnificent opportunity that life provides.
CARL SAGAN

Inspirational Life Magnificent Opportunity Positive Provide Thankful
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.
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Awake Citizen Deserve Mind Species Understand Work World
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
The absence of evidence is not evidence of absence.
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Absence Evidence One Liner
Extraordinary claims require extraordinary evidence.
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Claim Evidence Extraordinary One Liner Requirement Science
People are not stupid. They believe things for reasons.
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Believe Deep People Reason Stupidity

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