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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

If it can be destroyed by the truth, it deserves to be destroyed by the truth.
CARL SAGAN

Deserve Destroy Justice Science Truth
The Earth is the only world known so far to harbor life.
CARL SAGAN

Earth Harbor Life
The universe seems neither benign nor hostile, merely indifferent.
CARL SAGAN

Hostile Indifference Universe
All civilizations become either spacefaring or extinct.
CARL SAGAN

Civilization Extinct Science Space
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 live on a mote of dust suspended in a sunbeam.
CARL SAGAN

Dust Live Sun Suspend
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
One of the great commandments of science is: Mistrust arguments from authority.
CARL SAGAN

Argument Authority Command Greatness Science Trust
The universe is not required to be in perfect harmony with human ambition.
CARL SAGAN

Ambition Harmony Human Perfection Requirement Universe
Science is a way of thinking much more than it is a body of knowledge.
CARL SAGAN

Body Knowledge Science Thinking
Better the hard truth, I say, than the comforting fantasy.
CARL SAGAN

Comfortable Fantasy Inspirational Truth
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 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
If you wish to make an apple pie from scratch, you must first invent the universe.
CARL SAGAN

Apple Invention Science Scratch Universe
The price we pay for anticipation of the future is anxiety about it.
CARL SAGAN

Anticipation Anxiety Future Pay Price
Science is an attempt, largely successful, to understand the world, to get a grip on things, to get hold of ourselves, to steer a safe course.
CARL SAGAN

Attempt Course Ourselves Safe Science Success Understand World

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