Carl Sagan Quotes, Mathematics Quotes, Certain Quotes

Except in pure mathematics, nothing is known for certain (although much is certainly false).

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Tags : Carl Sagan Quotes , Mathematics Quotes , Certain Quotes

Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.

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Tags : Carl Sagan Quotes , Death Quotes , History Quotes

The cosmic calendar compresses the local history of the universe into a single year. If the universe began on January 1st it was not until May that the Milky Way formed. Other planetary systems may have appeared in June, July and August, but our Sun and Earth not until mid-September. Life arose soon after. We humans appear on the cosmic calendar so recently that our recorded history occupies only the last few seconds of the last minute of December 31st.

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Tags : Carl Sagan Quotes , June Quotes , July Quotes

If all the suns but ours collapsed tonight, how many lifetimes would it take us to realize that we were alone?

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Maxwell's Equations have had a greater impact on human history than any ten presidents.

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Humans are very good at dreaming, although you'd never know it from your television.

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Religions are tough. Either they make no contentions which are subject to disproof or they quickly redesign doctrine after disproof. ... near the core of the religious experience is something remarkably resistant to rational inquiry.

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We humans appear on the cosmic calendar so recently that our recorded history occupies only the last few seconds of the last minute of December 31st.

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Tags : Carl Sagan Quotes , Lasts Quotes , Calendars Quotes

The politicians and the religious leaders and the weapons scientists have been at it for a long time and they've made a thorough mess of it. I mean, we're in deep trouble.

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Tags : Carl Sagan Quotes , Religious Quotes , Atheist Quotes

Books tap the wisdom of our species -- the greatest minds, the best teachers -- from all over the world and from all our history. And they're patient.

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

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If you are only skeptical, then no new ideas make it through to you.

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Tags : Carl Sagan Quotes , Science Quotes , Acceptance Quotes

Science is a way to call the bluff of those who only pretend to knowledge. It is a bulwark against mysticism, against superstition, against religion misapplied to where it has no business being.

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Tags : Carl Sagan Quotes , Superstitions Quotes , Way Quotes

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.

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Tags : Carl Sagan Quotes , Love Quotes , Inspirational Quotes

Frederick Douglas taught that literacy is the path from slavery to freedom. There are many kinds of slavery and many kinds of freedom, but reading is still the path.

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Tags : Carl Sagan Quotes , Reading Quotes , Slavery Quotes

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.

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The well-meaning contention that all ideas have equal merit seems to me little different from the disastrous contention that no ideas have any merit.

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We live in a society exquisitely dependent on science and technology and yet have cleverly arranged things so that almost no one understands science and technology.

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Tags : Carl Sagan Quotes , Science Quotes , Technology Quotes

We are rare and precious because we are alive, because we can think as well as we can. We are privileged to influence and perhaps control our future. I believe we have an obligation to fight for life on Earth - not just for ourselves, but for all those, humans and others, who came before us, and to whom we are beholden, and for all those who, if we are wise enough, will come after.

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If we do not speak for Earth, who will? If we are not committed to our own survival, who will be?

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Tags : Carl Sagan Quotes , Survival Quotes , Earth Quotes