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Carl Sagan Quote - You have to know the past to understand the present.

You have to know the past to understand the present.

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Deep Inspirational One Liner Past Present Understand

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

The Earth is a very small stage in a vast cosmic arena.
CARL SAGAN

Arena Cosmic Earth Stage Vast
I consider it an extremely dangerous doctrine, because the more likely we are to assume that the solution comes from the outside, the less likely we are to solve our problems ourselves.
CARL SAGAN

Assume Come Consideration Danger Extreme Ourselves Outside Problem Solution
For small creatures such as we the vastness is bearable only through love.
CARL SAGAN

Creature Love Vast
The very act of understanding is a celebration of joining, merging, even if on a very modest scale, with the magnificence of the Cosmos.
CARL SAGAN

Act Celebration Cosmic Magnificant Merge Modest Scale Understand
Imagination will often carry us to worlds that never were, but without it we go nowhere.
CARL SAGAN

Business Carry Imagination Inspirational World
The Earth is the only world known so far to harbor life.
CARL SAGAN

Earth Harbor Life
The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.
CARL SAGAN

Atom Beauty Cosmic Couple Live Marriage Togetherness
Except in pure mathematics, nothing is known for certain (although much is certainly false).
CARL SAGAN

Certain Except False Mathematics Pure
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
We are like butterflies who flutter for a day and think it is forever.
CARL SAGAN

Butterfly Forever Human Nature Thinking
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
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
We make our world significant by the courage of our questions and the depth of our answers.
CARL SAGAN

Courage Depth Significance World
Books permit us to voyage through time, to tap the wisdom of our ancestors.
CARL SAGAN

Book Permit Time Voyage Wisdom
All civilizations become either spacefaring or extinct.
CARL SAGAN

Civilization Extinct Science Space
Science is not only compatible with spirituality; it is a profound source of spirituality.
CARL SAGAN

Compatible Profound Science Soource Spiritual

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