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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

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
For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.
CARL SAGAN

Assure Delusion Grasp Persistence Satisfaction Universe
The cure for a fallacious argument is a better argument, not the suppression of ideas.
CARL SAGAN

Argument Cure Ideas Suppression
The Earth is the only world known so far to harbor life.
CARL SAGAN

Earth Harbor Life
The notion that science and spirituality are somehow mutually exclusive does a disservice to both.
CARL SAGAN

Exclusive Mutual Notion Science Spiritual
Where we have strong emotions, we’re liable to fool ourselves.
CARL SAGAN

Atheist Emotion Fools Liable Ourselves Strong
We are star stuff harvesting sunlight.
CARL SAGAN

Harvest Stars Stuff Sunlight
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
Those at too great a distance may, I am well are, mistake ignorance for perspective.
CARL SAGAN

Distance Greatness Ignorance Mistake Perspective
Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.
CARL SAGAN

Cosmic Disagree Finding Galaxy Human Love Mercy Perspective Precious
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
Extinction is the rule. Survival is the exception.
CARL SAGAN

Exception Exrinction Rule Survival
The significance of our lives and our fragile planet is then determined only by our own wisdom and courage.
CARL SAGAN

Courage Determination Fragile Live Planet Significance Wisdom
A galaxy is composed of gas and dust and stars – billions upon billions of stars. Every star may be a sun to someone.
CARL SAGAN

Compose Dust Galaxy Gas Stars Sun
There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths.
CARL SAGAN

Delicate Forbidden Matter Scare Science Sensitive Truth
Nothing disturbs me more than the glorification of stupidity.
CARL SAGAN

Disturb Glory Stupidity

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