You have to know the past to understand the present.
CARL SAGANIf we continue to accumulate only power and not wisdom, we will surely destroy ourselves.
More Carl Sagan Quotes
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If it can be destroyed by the truth, it deserves to be destroyed by the truth.
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The only thing we’ve found that makes the emptiness bearable, is each other.
CARL SAGAN -
We are star stuff harvesting sunlight.
CARL SAGAN -
I would suggest that science is, at least in my part, informed worship.
CARL SAGAN -
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.
CARL SAGAN -
Extraordinary claims require extraordinary evidence.
CARL SAGAN -
Understanding is a kind of ecstasy.
CARL SAGAN -
Stars are phoenixes, rising from their own ashes.
CARL SAGAN -
The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.
CARL SAGAN -
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 -
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 -
The universe seems neither benign nor hostile, merely indifferent.
CARL SAGAN -
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 -
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 -
The cure for a fallacious argument is a better argument, not the suppression of ideas.
CARL SAGAN







