Quotes from Carl Sagan

If anything like this is true, then we would be denied even our self-congratulatory distinction of being the only animal that makes self-congratulatory distinctions.

The family tree of each of us is graced by all those great inventors: the beings who first tried out self-replication, the manufacture of protein machine tools, the cell, cooperation, predation, symbiosis, photosynthesis, breathing oxygen, sex, hormones, brains, and all the rest-inventions we use, some of them, minute-by-minute without ever wondering who devised them and how much we owe to these unknown benefactors, in a chain 100 billion links long.

MacLean has shown that the R-complex plays an important role in aggressive behavior, territoriality, ritual and the establishment of social hierarchies. Despite occasional welcome exceptions, this seems to me to characterize a great deal of modern human bureaucratic and political behavior.

Toda nuestra ciencia, comparada con la realidad, es primitiva e infantil… y sin embargo es lo más preciado que tenemos. ALBERT EINSTEIN (1879-1955)

Humans are good, she knew, at discerning subtle patterns that are really there, but equally so at imagining them when they are altogether absent.

The fact is that far more crime and child abuse has been committed by zealots in the name of God, Jesus and Mohammed than has ever been committed in the name of Satan. Many people don't like that statement, but few can argue with it.

By far the most exciting, satisfying and exhilarating time to be alive is the time in which we pass from ignorance to knowledge on these fundamental issues; the age where we begin in wonder and end in understanding. In all of the four-billion-year history of life on our planet, in all of the four-million-year history of the human family, there is only one generation privileged to live through that unique transitional moment: that generation is ours.

And all I'm saying is that it is within our capability to survive. I don't guarantee it. Prophecy is a lost art. And I don't know what the probabilities are that we will go one way or another. And no one says it's easy. But it is clear, as Einstein said, that if we do not make a change in our way of thinking, all is lost.

the English philosopher John Stuart Mill argued that silencing an opinion is "a peculiar evil." If the opinion is right, we are robbed of the "opportunity of exchanging error for truth"; and if it's wrong, we are deprived of a deeper understanding of the truth in "its collision with error.

If we scrutinize 100,000 pictures, it's not surprising that occasionally we'll come upon something like a face. With our brains programmed for this from infancy, it would be amazing if we couldn't find one here and there.

Each time it happens we're tempted to infer the direct intervention of a Maker.

Every major power has some widely publicized justification for its procurement and stockpiling of weapons of mass destruction, often including a reptilian reminder of the presumed character and cultural defects of potential enemies (as opposed to us stout fellows), or of the intentions of others, but never ourselves, to conquer the world.

Spurious accounts that snare the gullible are readily available. Skeptical treatments are much harder to find. Skepticism does not sell well.

In all our journeying through space and time, it is, so far, the only world on which we know with certainty that the matter of the Cosmos has become alive and aware.

In a time haunted by drought, plague, and war, with no social or medical services available to the average person, with public literacy and the scientific method unheard of, skeptical thinking was rare.

Of all the planets, moons, asteroids, and comets in our Solar System, there is fire only on Earth—because there are large amounts of oxygen gas, O2, only on Earth. Fire was, much later, to have profound consequences for life and intelligence. One thing leads to another.

Our individual growth represents the advancement of the species. The exploration of the cosmos is a voyage of self-discovery.

Contemplated as one grand whole, astronomy is the most beautiful monument of the human mind; the noblest record of its intelligence.

Some of science is very simple. When it gets complicated, that's usually because the world is complicated—or because we're complicated. When we shy away from it because it seems too difficult (or because we've been taught so poorly), we surrender the ability to take charge of our future. We are disenfranchised. Our self-confidence erodes.

I know personally, both from having science explained to me and from my attempts to explain it to others, how gratifying it is when we get it, when obscure terms suddenly take on meaning, when we grasp what all the fuss is about, when deep wonders are revealed.

The astonishing fact is that similar mathematics applies so well to planets and to clocks. It needn't have been this way. We didn't impose it on the Universe. That's the way the Universe is. If this is reductionism, so be it.

Mašta ?e nas ?esto odvoditi do svjetova kojih nikada nije bilo. Ali bez nje nikamo ne bismo stigli. Sumnja nam omogu?uje da razlu?imo maštu od ?injenica, da provjerimo naša razmišljanja.

What thin partitions sense from thought divide!

This sort of information gathering is precisely what we call play. And the important function of play is thus revealed: it permits us to gain, without any particular future application in mind, a holistic understanding of the world, which is both a complement of and a preparation for later analytical activities.