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This excerpt from Carl Sagan's book Pale Blue Dot was inspired by an image taken, at Sagan's suggestion, by Voyager 1 on February 14, 1990. As the spacecraft left our planetary neighborhood for the fringes of the solar system, engineers turned it around for one last look at its home planet. Voyager 1 was about 6.4 billion kilometers (4 billion miles) away, and approximately 32 degrees above the ecliptic plane, when it captured this portrait of our world. Caught in the center of scattered light rays (a result of taking the picture so close to the Sun), Earth appears as a tiny point of light, a crescent only 0.12 pixel in size.
Original Voyager 1 Image [svs.gsfc.nasa.gov]


From this distant vantage point, the Earth might not seem of any particular interest. But for us, it's different. Consider again that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar," every "supreme leader," every saint and sinner in the history of our species lived there – on a mote of dust suspended in a sunbeam.

The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that in glory and triumph they could become the momentary masters of a fraction of a dot. Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner. How frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds. Our posturings, our imagined self-importance, the delusion that we have some privileged position in the universe, are challenged by this point of pale light. 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.

The Earth is the only world known, so far, to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment, the Earth is where we make our stand. It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another and to preserve and cherish the pale blue dot, the only home we've ever known.

—Carl Sagan, Pale Blue Dot: A Vision of the Human Future in Space

For a Zip file containing all 3 versions of the video and speech (Original Cosmos: A Personal Voyage , The Carl Sagan Series video by Reid Gower, and the new Cosmos: A Spacetime Odyssey video), the original image taken by the Voyager 1 spacecraft, a copy of the speech, and an inspiring animation created by the artist Joel Somerfield, click this: https://www.dropbox.com/s/zype18a3o5s0zms/Pale_Blue_Dot.zip?dl=0

This is the first video in Reid Gower's really amazing Sagan Series on Youtube. I highly recomend this if you have not seen them yet. Enjoy.

For Joel Somerfield's awesome animation set to this speech, Click Here
If you want to know more, here is the Wiki Page [en.wikipedia.org]

Edit: Reid Gower's version of the Pale Blue Dot speech in his awesome and popular Sagan Series on Youtube has since been taken down due to some copyright issues, it's the only part of the series to suffer this fate, however, I was lucky enough to preserve it in the zip file I linked above before this happened, so downloaded, post it, spread it, preserve it, it's amazing and should kept for all time. This is one of the only places you can find it.