figure out how to do it. We need more scientific research and more technological restraint. It is probably too much to hope that some great Ecosystem Keeper in the sky will reach down and put right our environmental abuses. It is up to us.
It should not be impossibly difficult. Birds—whose intelligence we tend to malign—know not to defile the nest. Shrimps with brains the size of lint particles know it. Algae know it. One-celled microorganisms know it. It is time for us to know it too." - Meaning and context.">
QuotesCosmos
Chapter 7, “The World That Came in the Mail” (pp. 67-68)
“

If we are not graced with an instinctive knowledge of how to make our technologized world a safe and balanced ecosystem, we must figure out how to do it. We need more scientific research and more technological restraint. It is probably too much to hope that some great Ecosystem Keeper in the sky will reach down and put right our environmental abuses. It is up to us.
It should not be impossibly difficult. Birds—whose intelligence we tend to malign—know not to defile the nest. Shrimps with brains the size of lint particles know it. Algae know it. One-celled microorganisms know it. It is time for us to know it too.

— Carl Sagan

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "If we are not graced with an instinctive knowledge of how to make our technologized world a safe and balanced ecosystem, we must figure out how to do it. We need more scientific research and more technological restraint. It is probably too much to hope that some great Ecosystem Keeper in the sky will reach down and put right our environmental abuses. It is up to us.
It should not be impossibly difficult. Birds—whose intelligence we tend to malign—know not to defile the nest. Shrimps with brains the size of lint particles know it. Algae know it. One-celled microorganisms know it. It is time for us to know it too." in the context of "Chapter 7, “The World That Came in the Mail” (pp. 67-68)" to mean that wisdom is timeless.

Quote Image
Source: Wikiquote: "Carl Sagan" (Quotes, Billions and Billions: Thoughts on Life and Death at the Brink of the Millenium (1997): (1997), Billions and Billions: Thoughts on Life and Death at the End of the Millennium place: New York, publisher: Random House, ISBN: 0679411607, LCCN: 96052730 All page numbers from the trade paperback edition, 5th printing All italics as in the book ) The 'What it means' explanation text was generated by Google Gemini Flash (accessed January 18, 2026). https://gemini.google.com/app

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Carl Sagan

About Carl Sagan

Carl Edward Sagan (9 November 1934 – 20 December 1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space, the Pioneer plaque and the Voyager Golden Record, universal messages that could potentially be understood by any extraterrestrial intelligence that might find them. Sagan argued the hypothesis, accepted since, that the high surface temperatures of Venus can be attributed to, and calculated using, the greenhouse effect. He testified to the US Congress in 1985 that the greenhouse effect will change the earth's climate system.