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Aging & Wisdom Quote by Peter Medawar

"Today the world changes so quickly that in growing up we take leave not just of youth but of the world we were young in"

About this Quote

Modernity doesn’t just steal your adolescence; it repossesses the backdrop. Medawar, a scientist with a humanist’s ear for emotional precision, frames “growing up” as a double departure: you outgrow your younger self, and the world that once made sense of that self. The sly sting is in the escalation from private loss (youth) to public loss (the world we were young in). Nostalgia usually flatters us into thinking we’ve changed while “the good old days” remain intact in memory. Medawar denies that comfort. The past isn’t a stable set you can revisit; it’s been demolished and rebuilt while you were busy becoming an adult.

The intent is diagnostic, not merely wistful. Coming from a 20th-century scientist who lived through world wars, the rise of mass media, and accelerating technological churn, the line reads like an observation about speed as a cultural force. “Today” matters: it signals a historical shift, an era where generational difference isn’t just about taste or manners but about operating systems - social, political, technological - that can make someone feel prematurely obsolete.

Subtext: the ache of disorientation is rational. If the environment changes fast enough, maturation stops being a gradual adjustment and becomes repeated immigration. You learn adulthood in one world and then have to practice it in another. That’s why the sentence works: it turns the sentimentality of “losing youth” into something sharper and more structural - a reminder that identity is partly an ecosystem, and ecosystems can vanish.

Quote Details

TopicNostalgia
Source
Verified source: Presidential Address to the British Association (Exeter, ... (Peter Medawar, 1969)
Text match: 95.00%   Provider: Cross-Reference
Evidence:
Today the world changes so quickly that in growing up we take leave not just of youth but of the world we were young in. I suppose we all realize the degree to which fear and resentment of what is new is really a lament for the memories of our childhood.. Earliest primary-source attribution I can substantiate online is to Medawar’s Presidential Address to the British Association for the Advancement of Science, delivered in Exeter on 3 September 1969, commonly titled/associated with “On ‘The Effecting of All Things Possible’.” Wikiquote explicitly gives this as the source. I also located a full-text web transcription of “On ‘The Effecting of All Things Possible’” that contains the sentence verbatim, but it’s a later (1996) typed transcription and not the original publication; it still supports the wording but not ‘first publication’ details. I was not able (from openly accessible primary scans) to verify the page number in the first printed publication of the address, nor to confirm whether an official BAAS printed proceedings version appeared in 1969/1970 before Medawar reprinted it in his 1972 collection “The Hope of Progress.”
Other candidates (1)
Scarred by Struggle, Transformed by Hope (Joan Chittister, 2005) compilation95.8%
... Peter Medawar reminds us that " Today the world changes so quickly that in growing up we take leave not just of y...
Cite

Citation Formats

APA Style (7th ed.)
Medawar, Peter. (2026, February 22). Today the world changes so quickly that in growing up we take leave not just of youth but of the world we were young in. FixQuotes. https://fixquotes.com/quotes/today-the-world-changes-so-quickly-that-in-120642/

Chicago Style
Medawar, Peter. "Today the world changes so quickly that in growing up we take leave not just of youth but of the world we were young in." FixQuotes. February 22, 2026. https://fixquotes.com/quotes/today-the-world-changes-so-quickly-that-in-120642/.

MLA Style (9th ed.)
"Today the world changes so quickly that in growing up we take leave not just of youth but of the world we were young in." FixQuotes, 22 Feb. 2026, https://fixquotes.com/quotes/today-the-world-changes-so-quickly-that-in-120642/. Accessed 5 Mar. 2026.

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About the Author

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Peter Medawar (February 28, 1915 - October 2, 1987) was a Scientist from Brazil.

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