Carl Sagan

“Who is really in charge of this planet?”

— Carl Sagan

We are all star stuff.

— Carl Sagan

We were wanderers from the beginning.

— Carl Sagan

We are star stuff harvesting sunlight.

— Carl Sagan

Science is a way to not fool ourselves.

— Carl Sagan

Valid criticism does you a favor.

— Carl Sagan

Billions and billions.

— Carl Sagan

All colours are arbitrary.

— Carl Sagan

“La ausencia de pruebas no es prueba de ausencia.”

— Carl Sagan

We began as wanderers, and we are wanderers still.

— Carl Sagan

The Cosmos is all that is or ever was or ever will be.

— Carl Sagan

Wisdom lies in understanding our limitations.

— Carl Sagan

Across the sea of space, the stars are other suns.

— Carl Sagan

There is never only ONE of anything in nature.

— Carl Sagan

“… where ignorance is bliss, ’Tis folly to be wise wrote the poet Thomas Gray.”

— Carl Sagan

To live in the hearts of others is to never die in those we leave behind.

— Carl Sagan

Those who seek power at any price detect a societal weakness, a fear that they can ride into office.

— Carl Sagan

It would be wryly interesting if in human history the cultivation of marijuana led generally to the invention of agriculture, and thereby…

— Carl Sagan

We live at a moment when our relationships to each other, and to all other beings with whom we share this planet,…

— Carl Sagan

“Their position seems to be that their God is so great he doesn't even have to exist.”

— Carl Sagan

Every thinking person fears nuclear war, and every technological state plans for it. Everyone knows it is madness, and every nation has…

— Carl Sagan

We have heard the rationales offered by the nuclear superpowers. We know who speaks for the nations. But who speaks for the…

— Carl Sagan

“The fossil record implies trial and error, an inability to anticipate the future, features inconsistent with an efficient Great Designer.”

— Carl Sagan

Knowing a great deal is not the same as being smart; intelligence is not information alone but also judgement, the manner in…

— Carl Sagan

After the earth dies, some 5 billion years from now, after it's burned to a crisp, or even swallowed by the Sun,…

— Carl Sagan

The neurochemistry of the brain is astonishingly busy, the circuitry of a machine more wonderful than any devised by humans. But there…

— Carl Sagan

“For a long time the human instinct to understand was thwarted by facile religious explanations, as in ancient Greece in the time…

— Carl Sagan

“Think of the rivers of blood, spilled by all those generals and emperors, so that in glory and triumph, they could become…

— Carl Sagan

Science is a collaborative enterprise, spanning the generations. When it permits us to see the far side of some new horizon, we…

— Carl Sagan

“Nietzsche mourns the loss of “man’s belief in his dignity, his uniqueness, his irreplace-ability in the scheme of existence.” For me, it…

— Carl Sagan

We have begun to contemplate our origins: starstuff pondering the stars; organized assemblages of ten billion billion billion atoms considering the evolution…

— Carl Sagan

“You might imagine an uncharitable extraterrestrial observer looking down on our species... - with us excitedly chattering, "The Universe is created for…

— Carl Sagan

We've tended in our cosmologies to make things familiar. Despite all our best efforts, we've not been very inventive. In the West,…

— Carl Sagan

“The surface of the Earth is the shore of the cosmic ocean. From it we have learned most of what we know.…

— Carl Sagan

I went to the librarian and asked for a book about stars… And the answer was stunning. It was that the Sun…

— Carl Sagan

“A deception arises, sometimes innocently but collaboratively, sometimes with cynical premeditation. Usually the victim is caught up in a powerful emotion -…

— Carl Sagan

Imagine a room awash in gasoline, and there are two implacable enemies in that room. One of them has nine thousand matches.…

— Carl Sagan

“When an object impacts the Moon at high speed, it sets the Moon slightly wobbling. Eventually the vibrations die down but not…

— Carl Sagan

“When we are asked to swear in American courts of law—that we will tell “the truth, the whole truth, and nothing but…

— Carl Sagan

“In general, human societies are not innovative. They are hierarchical and ritualistic. Suggestions for change are greeted with suspicion: they imply an…

— Carl Sagan