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Carl Sagan Quote - Except in pure mathematics, nothing is known for certain (although much is certainly false).

Except in pure mathematics, nothing is known for certain (although much is certainly false).

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Certain Except False Mathematics Pure

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

One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time.
CARL SAGAN

Book Dead Glance Hear Perhaps Reading Time Voice Voyage
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
Not all birds can fly. What separates the flyers from the walkers is the ability to take off.
CARL SAGAN

Ability Bird Fly Motivational Separate Walk Work Hard
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
The Earth is a very small stage in a vast cosmic arena.
CARL SAGAN

Arena Cosmic Earth Stage Vast
Stars are phoenixes, rising from their own ashes.
CARL SAGAN

Ash Rise Science Stars
I think the health of our civilization, the depth of our awareness about the underpinnings of our culture and our concern for the future can all be tested by how well we support our libraries.
CARL SAGAN

Awareness Book Civilization Concern Culture Depth Future Health Library Test
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
Better the hard truth, I say, than the comforting fantasy.
CARL SAGAN

Comfortable Fantasy Inspirational Truth
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
Books permit us to voyage through time, to tap the wisdom of our ancestors.
CARL SAGAN

Book Permit Time Voyage Wisdom
I’ve always thought an agnostic is an atheist without the courage of his convictions.
CARL SAGAN

Atheist Conviction Courage
Books break the shackles of time, proof that humans can work magic.
CARL SAGAN

Book Break Human Magic Proof Time Work
Science is a way to not fool ourselves.
CARL SAGAN

Fools One Liner Ourselves Science
If it can be destroyed by the truth, it deserves to be destroyed by the truth.
CARL SAGAN

Deserve Destroy Justice Science Truth

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