photo of Carl SaganPhoto Credit: WikiMedia Commons
quote by Carl Sagan: The cure for a fallacious argument is a better argument, not the suppression of ideas. with background image: photo of author Carl Sagan with quote

The cure for a fallacious argument is a better argument, not the suppression of ideas.

--Carl Sagan
quote by Carl Sagan: Science is more than a body of knowledge. It's a way of thinking: a way of skeptically interrogating the universe. with background image: photo of author Carl Sagan with quote

Science is more than a body of knowledge. It's a way of thinking: a way of skeptically interrogating the universe.

--Carl Sagan

Longer Version:

Science is much more than a body of knowledge. It is a way of thinking. This is central to its success. Science invites us to let the facts in, even when they don't conform to our preconceptions. It counsels us to carry alternative hypotheses in our heads and see which ones best match the facts. It urges on us a fine balance between no-holds-barred openness to new ideas, however heretical, and the most rigorous skeptical scrutiny of everything - new ideas and established wisdom.


quote by Carl Sagan: Even through your hardest days, remember we are all made of stardust. with background image: photo of author Carl Sagan with quote

Even through your hardest days, remember we are all made of stardust.

--Carl Sagan
quote by Carl Sagan: The Cosmos is all that is or ever was or ever will be. with background image: photo of author Carl Sagan with quote

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

--Carl Sagan

Longer Version:

The Cosmos is all that is or was or ever will be. Our feeblest contemplations of the Cosmos stir us there is a tingling in the spine, a catch in the voice, a faint sensation, as if a distant memory, of falling from a height. We know we are approaching the greatest of mysteries.


quote by Carl Sagan: Your god is too small for my universe. with background image: photo of author Carl Sagan with quote

Your god is too small for my universe.

--Carl Sagan
quote by Carl Sagan: If it can be destroyed by the truth, it deserves to be destroyed by the truth. with background image: photo of author Carl Sagan with quote

If it can be destroyed by the truth, it deserves to be destroyed by the truth.

--Carl Sagan
quote by Carl Sagan: You are made of a hundred trillion cells. We are, each of us, a multitude. with background image: photo of author Carl Sagan with quote

You are made of a hundred trillion cells. We are, each of us, a multitude.

--Carl Sagan
quote by Carl Sagan: We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people. with background image: photo of author Carl Sagan with quote

We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people.

--Carl Sagan
quote by Carl Sagan: We are a way for the cosmos to know itself. with background image: photo of author Carl Sagan with quote

We are a way for the cosmos to know itself.

--Carl Sagan
quote by Carl Sagan: We are alive and we resonate with idea of life elsewhere, but only careful accumulation and assessment of the evidence can tell us whether a given world is inhabited. with background image: photo of author Carl Sagan with quote

We are alive and we resonate with idea of life elsewhere, but only careful accumulation and assessment of the evidence can tell us whether a given world is inhabited.

--Carl Sagan



quote by Carl Sagan: All inquiries carry with them some element of risk. with background image: photo of author Carl Sagan with quote

All inquiries carry with them some element of risk.

--Carl Sagan

Longer Version:

All inquires carry with them some element of risk. There is no guarantee that the universe will conform to our predispositions.





quote by Carl Sagan: We are star stuff harvesting sunlight. with background image: photo of author Carl Sagan with quote

We are star stuff harvesting sunlight.

--Carl Sagan


quote by Carl Sagan: The universe is a pretty big place. If it's just us, seems like an awful waste of space. with background image: photo of author Carl Sagan with quote

The universe is a pretty big place. If it's just us, seems like an awful waste of space.

--Carl Sagan

quote by Carl Sagan: People are not stupid. They believe things for reasons. The last way for skeptics to get the attention of bright, curious, intelligent people is to belittle or condescend or to show arrogance toward … with background image: pink tulips in close up photography
Background Photo: Valeriia Miller

People are not stupid. They believe things for reasons. The last way for skeptics to get the attention of bright, curious, intelligent people is to belittle or condescend or to show arrogance toward their beliefs.

--Carl Sagan
quote by Carl Sagan: We can judge our progress by the courage of our questions and the depth of our answers, our willingness to embrace what is true rather than what feels good. with background image: photo of author Carl Sagan with quote

We can judge our progress by the courage of our questions and the depth of our answers, our willingness to embrace what is true rather than what feels good.

--Carl Sagan
quote by 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. with background image: photo of author Carl Sagan with quote

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


quote by Carl Sagan: The very act of understanding is a celebration of joining, merging, even if on a very modest scale, with the magnificence of the Cosmos. with background image: photo of author Carl Sagan with quote

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
quote by Carl Sagan: A single message from space will show that it is possible to live through technological adolescence... It is possible that the future of human civilization depends on the receipt of interstellar mess… with background image: white tulips with green leaves
Background Photo: Kilimanjaro STUDIOz

A single message from space will show that it is possible to live through technological adolescence... It is possible that the future of human civilization depends on the receipt of interstellar messages.

--Carl Sagan
quote by Carl Sagan: A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself is doomed. We are one planet. with background image: photo of author Carl Sagan with quote

A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself is doomed. We are one planet.

--Carl Sagan

Longer Version:

A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself is doomed. We are one planet. One of the great revelations of the age of space exploration is the image of the earth finite and lonely, somehow vulnerable, bearing the entire human species through the oceans of space and time.




quote by Carl Sagan: A blade of grass is a commonplace on Earth; it would be a miracle on Mars. Our descendants on Mars will know the value of a patch of green. And if a blade of grass is priceless, what is the value of … with background image: bride and groom on green grass field
Background Photo: Anna Vi

A blade of grass is a commonplace on Earth; it would be a miracle on Mars. Our descendants on Mars will know the value of a patch of green. And if a blade of grass is priceless, what is the value of a human being?

--Carl Sagan
quote by Carl Sagan: The surface of the Earth is the shore of the cosmic ocean. with background image: photo of author Carl Sagan with quote

The surface of the Earth is the shore of the cosmic ocean.

--Carl Sagan

Longer Version:

The surface of the Earth is the shore of the cosmic ocean. On this shore, we've learned most of what we know. Recently, we've waded a little way out, maybe ankle-deep, and the water seems inviting. Some part of our being knows this is where we came from. We long to return, and we can, because the cosmos is also within us. We're made of star stuff. We are a way for the cosmos to know itself.


quote by Carl Sagan: While our behavior is still significantly controlled by our genetic inheritance, we have, through our brains, a much richer opportunity to blaze new behavioral and cultural pathways on short timescal… with background image: brown wallpaper
Background Photo: Suganth

While our behavior is still significantly controlled by our genetic inheritance, we have, through our brains, a much richer opportunity to blaze new behavioral and cultural pathways on short timescales.

--Carl Sagan
quote by Carl Sagan: Where we have strong emotions, we're liable to fool ourselves. with background image: photo of author Carl Sagan with quote

Where we have strong emotions, we're liable to fool ourselves.

--Carl Sagan

quote by Carl Sagan: I think the discomfort that some people feel in going to the monkey cages at the zoo is a warning sign. with background image: photo of author Carl Sagan with quote

I think the discomfort that some people feel in going to the monkey cages at the zoo is a warning sign.

--Carl Sagan

quote by Carl Sagan: If we are merely matter intricately assembled, is this really demeaning? If there's nothing here but atoms, does that make us less or does that make matter more? with background image: photo of author Carl Sagan with quote

If we are merely matter intricately assembled, is this really demeaning? If there's nothing here but atoms, does that make us less or does that make matter more?

--Carl Sagan
quote by Carl Sagan: In Mozambique, the story goes, monkeys do not talk, because they know if they utter even a single word some man will come and put them to work. with background image: photo of author Carl Sagan with quote

In Mozambique, the story goes, monkeys do not talk, because they know if they utter even a single word some man will come and put them to work.

--Carl Sagan
quote by Carl Sagan: Stars are phoenixes, rising from their own ashes. with background image: photo of author Carl Sagan with quote

Stars are phoenixes, rising from their own ashes.

--Carl Sagan
quote by Carl Sagan: We are one species. We are starstuff. with background image: photo of author Carl Sagan with quote

We are one species. We are starstuff.

--Carl Sagan
quote by Carl Sagan: We are all star stuff. with background image: photo of author Carl Sagan with quote

We are all star stuff.

--Carl Sagan
quote by Carl Sagan: The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff. with background image: photo of author Carl Sagan with quote

The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.

--Carl Sagan
quote by Carl Sagan: Advances in medicine and agriculture have saved vastly more lives than have been lost in all the wars in history. with background image: photo of author Carl Sagan with quote

Advances in medicine and agriculture have saved vastly more lives than have been lost in all the wars in history.

--Carl Sagan
quote by Carl Sagan: Like it or not, we humans are bound up with our fellows, and with the other plants and animals all over the world.
Our lives are intertwined. with background image: photo of author Carl Sagan with quote

Like it or not, we humans are bound up with our fellows, and with the other plants and animals all over the world.
Our lives are intertwined.

--Carl Sagan


quote by Carl Sagan: For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this appealing idea. The extraordinary claims are not supported by extra… with background image: high-angle photography of beach side
Background Photo: Syd Sujuaan

For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this appealing idea. The extraordinary claims are not supported by extraordinary evidence.

--Carl Sagan


quote by Carl Sagan: Science is only a Latin word for knowledge. with background image: photo of author Carl Sagan with quote

Science is only a Latin word for knowledge.

--Carl Sagan
quote by Carl Sagan: 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. with background image: photo of author Carl Sagan with quote

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
quote by Carl Sagan: It is clear that the nations of the world now can only rise and fall together. It is not a question of one nation winning at the expense of another. We must all help one another or all perish togethe… with background image: white printer paper on brown wooden table
Background Photo: Marjan Blan | @marjanblan

It is clear that the nations of the world now can only rise and fall together. It is not a question of one nation winning at the expense of another. We must all help one another or all perish together.

--Carl Sagan

quote by Carl Sagan: Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves. with background image: photo of author Carl Sagan with quote

Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.

--Carl Sagan


quote by Carl Sagan: We are an intelligent species and the use of our intelligence quite properly gives us pleasure. In this respect the brain is like a muscle. When we think well, we feel good. Understanding is a kind o… with background image: bride and groom on green grass field
Background Photo: Anna Vi

We are an intelligent species and the use of our intelligence quite properly gives us pleasure. In this respect the brain is like a muscle. When we think well, we feel good. Understanding is a kind of ecstasy.

--Carl Sagan

quote by Carl Sagan: We are like butterflies who flutter for a day and think it is forever. with background image: brown, black, and white butterfly on purple petaled flower photo
Background Photo: Dan Freeman

We are like butterflies who flutter for a day and think it is forever.

--Carl Sagan
quote by Carl Sagan: Science is not only compatible with spirituality; it is a profound source of spirituality. with background image: photo of author Carl Sagan with quote

Science is not only compatible with spirituality; it is a profound source of spirituality.

--Carl Sagan

Longer Version:

Science is not only compatible with spirituality; it is a profound source of spirituality. When we recognize our place in an immensity of light‐years and in the passage of ages, when we grasp the intricacy, beauty, and subtlety of life, then that soaring feeling, that sense of elation and humility combined, is surely spiritual. So are our emotions in the presence of great art or music or literature, or acts of exemplary selfless courage such as those of Mohandas Gandhi or Martin Luther King, Jr. The notion that science and spirituality are somehow mutually exclusive does a disservice to both.



quote by Carl Sagan: Our loyalties are to the species and the planet. We speak for Earth. with background image: photo of author Carl Sagan with quote

Our loyalties are to the species and the planet. We speak for Earth.

--Carl Sagan

Longer Version:

Our loyalties are to the species and the planet. We speak for Earth. Our obligation to survive is owed not just to ourselves but also to that Cosmos, ancient and vast, from which we spring.


quote by Carl Sagan: All civilizations become either spacefaring or extinct. with background image: photo of author Carl Sagan with quote

All civilizations become either spacefaring or extinct.

--Carl Sagan



quote by Carl Sagan: The total amount of energy from outside the solar system ever received by all the radio telescopes on the planet Earth is less than the energy of a single snowflake striking the ground. with background image: photo of author Carl Sagan with quote

The total amount of energy from outside the solar system ever received by all the radio telescopes on the planet Earth is less than the energy of a single snowflake striking the ground.

--Carl Sagan
quote by Carl Sagan: By looking far out into space we are also looking far back into time, back toward the horizon of the universe, back toward the epoch of the Big Bang. with background image: photo of author Carl Sagan with quote

By looking far out into space we are also looking far back into time, back toward the horizon of the universe, back toward the epoch of the Big Bang.

--Carl Sagan
quote by Carl Sagan: Sailors on a becalmed sea, we sense the stirring of a breeze. with background image: photo of author Carl Sagan with quote

Sailors on a becalmed sea, we sense the stirring of a breeze.

--Carl Sagan
quote by Carl Sagan: Across the sea of space, the stars are other suns. with background image: photo of author Carl Sagan with quote

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

--Carl Sagan

quote by Carl Sagan: If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds. Sailors on a becalmed sea, we sense the stirring of a breeze. with background image: photo of author Carl Sagan with quote

If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds. Sailors on a becalmed sea, we sense the stirring of a breeze.

--Carl Sagan

quote by Carl Sagan: You have to know the past to understand the present. with background image: photo of author Carl Sagan with quote

You have to know the past to understand the present.

--Carl Sagan
quote by Carl Sagan: The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together. with background image: lion on green grass during golden hour
Background Photo: Keyur Nandaniya

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

--Carl Sagan

Longer Version:

The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together. Information distilled over 4 billion years of biological evolution. Incidentally, all the organisms on the Earth are made essentially of that stuff. An eyedropper full of that liquid could be used to make a caterpillar or a petunia if only we knew how to put the components together.



quote by Carl Sagan: The visions we offer our children shape the future. with background image: photo of author Carl Sagan with quote

The visions we offer our children shape the future.

--Carl Sagan

Longer Version:

The visions we offer our children shape the future. It _matters_ what those visions are. Often they become self-fulfilling prophecies. Dreams are maps.


quote by Carl Sagan: A book is proof that humans are capable of working magic. with background image: photo of author Carl Sagan with quote

A book is proof that humans are capable of working magic.

--Carl Sagan

quote by 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. with background image: photo of author Carl Sagan with quote

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
quote by Carl Sagan: I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students. with background image: photo of author Carl Sagan with quote

I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students.

--Carl Sagan
quote by Carl Sagan: Extinction is the rule. Survival is the exception. with background image: photo of author Carl Sagan with quote

Extinction is the rule. Survival is the exception.

--Carl Sagan
quote by Carl Sagan: The universe is not required to be in perfect harmony with human ambition. with background image: photo of author Carl Sagan with quote

The universe is not required to be in perfect harmony with human ambition.

--Carl Sagan
quote by Carl Sagan: All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year. Not all bits have equal value. with background image: photo of author Carl Sagan with quote

All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year. Not all bits have equal value.

--Carl Sagan
quote by Carl Sagan: Absence of evidence is not evidence of absence. with background image: photo of author Carl Sagan with quote

Absence of evidence is not evidence of absence.

--Carl Sagan
quote by Carl Sagan: A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism. with background image: photo of author Carl Sagan with quote

A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.

--Carl Sagan
quote by Carl Sagan: We've arranged a civilization in which most crucial elements profoundly depend on science and technology. with background image: photo of author Carl Sagan with quote

We've arranged a civilization in which most crucial elements profoundly depend on science and technology.

--Carl Sagan
quote by Carl Sagan: For small creatures such as we the vastness is bearable only through love. with background image: photo of author Carl Sagan with quote

For small creatures such as we the vastness is bearable only through love.

--Carl Sagan
quote by Carl Sagan: When you make the finding yourself -- even if you're the last person on Earth to see the light -- you'll never forget it. with background image: photo of author Carl Sagan with quote

When you make the finding yourself -- even if you're the last person on Earth to see the light -- you'll never forget it.

--Carl Sagan
quote by Carl Sagan: If you wish to make an apple pie from scratch, you must first invent the universe. with background image: photo of author Carl Sagan with quote

If you wish to make an apple pie from scratch, you must first invent the universe.

--Carl Sagan
quote by Carl Sagan: Imagination will often carry us to worlds that never were. But without it we go nowhere. with background image: yellow, orange, red, green, and blue abstract painting
Background Photo: Markus Spiske

Imagination will often carry us to worlds that never were. But without it we go nowhere.

--Carl Sagan

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