Life, like a dome of many-coloured glass,

Stains the white radiance of eternity,

Until Death tramples it to fragments.

Shelley

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

I don't know anything, but I do know that everything is interesting if you go into it deeply enough.

- Richard Feynmann

"Buy my soda!" said the Moose Diarrhea Salesman. And we did. We all did. But when we got it home and opened up the package, it was not what they said it was. And rather than chucking it all and searching for something better, we're content with looking for another Moose Diarrhea Salesman."
― Jello Biafra

Our imagination is stretched to the utmost, not, as in fiction, to imagine things which are not really there, but just to comprehend those things which are there.

Richard Feynman

"Science is the belief in the ignorance of experts."
― Richard Feynman

"If you show me all your barbwire, I'll only show you scars."
― Dick Lucas

“The truth is, everyone is going to hurt you. You just got to find the ones worth suffering for.” 
― Bob Marley

“TO BE HOPEFUL in bad times is not just foolishly romantic. It is based on the fact that human history is a history not only of cruelty, but also of compassion, sacrifice, courage, kindness.
What we choose to emphasize in this complex history will determine our lives. If we see only the worst, it destroys our capacity to do something. If we remember those times and places—and there are so many—where people have behaved magnificently, this gives us the energy to act, and at least the possibility of sending this spinning top of a world in a different direction.
And if we do act, in however small a way, we don’t have to wait for some grand utopian future. The future is an infinite succession of presents, and to live now as we think human beings should live, in defiance of all that is bad around us, is itself a marvelous victory.” 
― Howard Zinn

“Trout, incidentally, had written a book about a money tree. It had twenty-dollar bills for leaves. Its flowers were government bonds. Its fruit was diamonds. It attracted human beings who killed each other around the roots and made very good fertilizer.” 
― Kurt Vonnegut, Slaughterhouse-Five

“She was a dull person, but a sensational invitation to make babies.” 
― Kurt Vonnegut, Slaughterhouse-Five