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Nature & environment quotes, explained

Writers and scientists on the natural world, wilderness and what we owe the planet. Each one is checked against its original source, so you know who really said it before you use it.

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“A thing of beauty is a joy for ever.”
John Keats · 1818
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“A thing of beauty is a joy for ever.”
John Keats · Endymion, Book I, line 1 · 1818 · Poet

The first line of Keats's long poem Endymion: beautiful things never lose their power to delight us, and their loveliness grows over time instead of fading.

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“Beauty is its own excuse for being.”
Ralph Waldo Emerson · The Rhodora: On Being Asked, Whence Is the Flower? · 1834 · Writer

Beautiful things do not need a purpose to justify them. A flower blooming where no one sees it is reason enough in itself.

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“I went to the woods because I wished to live deliberately.”
Henry David Thoreau · Walden, “Where I Lived, and What I Lived For” · 1854 · Writer

Thoreau explains why he moved to Walden Pond: to strip life down to its essentials and find out what it really has to teach, so that he would not reach death and discover he had not lived.

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“Survival of the fittest.”
Herbert Spencer · The Principles of Biology, Volume I · 1864 · Philosopher

Spencer's phrase for natural selection: organisms best suited to their environment survive and reproduce. “Fittest” means best adapted, not strongest.

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“That best portion of a good man's life, his little, nameless, unremembered acts of kindness and of love.”
William Wordsworth · Lines Composed a Few Miles above Tintern Abbey (Lyrical Ballads) · 1798 · Poet

The best part of a good person's life is not their big achievements but the small, everyday kindnesses that nobody records and they themselves forget.

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“The best-laid schemes o' mice an' men gang aft agley.”
Robert Burns · To a Mouse, on Turning Her Up in Her Nest with the Plough · 1785 · Poet

Burns, having wrecked a mouse's nest with his plough, tells her that the best plans of mice and men often go wrong, and that he is worse off than her because he worries about the past and the future.

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“The Child is father of the Man.”
William Wordsworth · “My Heart Leaps Up” (“The Rainbow”), Poems in Two Volumes · 1802 · Poet

The person we are as children shapes the adult we become. Wordsworth hopes his grown-up self will keep the wonder he felt as a child seeing a rainbow.

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“The coldest winter I ever spent was a summer in San Francisco.”
Often credited to Mark Twain · Anonymous weather joke, attached to Twain in the 20th century · 1789

An old joke about a cold summer, retold about many cities. Twain's papers contain nothing like it about San Francisco, though he did once retell an older version about Paris.

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“Two roads diverged in a wood, and I, I took the one less traveled by, and that has made all the difference.”
Robert Frost · The Road Not Taken, in Mountain Interval · 1916 · Poet

A traveler picks one of two paths that were “really about the same,” then imagines telling the story years later as if the choice made all the difference. It is a poem about how we tell stories about our choices.

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