One is constantly reminded of ...

One is constantly reminded of the infinite lavishness and fertility of Nature-inexhaustible abundance amid what seems enormous waste. And yet when we look into any of her operations that lie within reach of our minds, we learn that no particle of her material is wasted or worn out. It is eternally flowing from use to use, beauty to yet higher beauty; and we soon cease to lament waste and death, and rather rejoice and exult in the imperishable, unspendable wealth of the universe.
One is constantly reminded of the infinite lavishness and fertility of Nature-inexhaustible abundance amid what seems enormous waste. And yet when we look into any of her operations that lie within reach of our minds, we learn that no particle of her material is wasted or worn out. It is eternally flowing from use to use, beauty to yet higher beauty; and we soon cease to lament waste and death, and rather rejoice and exult in the imperishable, unspendable wealth of the universe.
 John Muir

Quotes from the same author

When one tugs at a single thing in nature, he finds it attached to the rest of the world.
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 John Muir
In every walk with nature, one receives far more than he seeks.
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 John Muir
There is a love of wild nature in everybody, an ancient mother-love showing itself whether recognized or no, and however covered by cares and duties
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 John Muir
I like to walk, touch living Mother Earth—bare feet best, and thrill every step. Used to envy happy reptiles that had advantage of so much body in contact with earth, bosom to bosom. [We] live with our heels as well as head and most of our pleasure comes in that way.
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 John Muir
Perhaps the profession of doing good may be full, but every body should be kind at least to himself. Take a course of good water and air, and in the eternal youth of Nature you may renew your own. Go quietly, alone; no harm will befall you. Some have strange, morbid fears as soon as they find themselves with Nature, even in the kindest and wildest of her solitudes, like very sick children afraid of their mother-as if God were dead and the devil were king.
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 John Muir