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Nothing is generated in a place where is no sentient vegetable and rational life; feathers grow on birds and change every year; coats grow on animals and are changed every year, with some exceptions, like the lion's beard and the cat's fur, and such; grass grows in the fields and leaves on the trees; and every year they are renewed in great part. Thus we can say that the spirit of growth is the soul of the earth, the soil its flesh, the ordered arrangement of rocks its bones, of which mountains are formed, the tufa its tendons; its blood the veins of water which surround its heart, which is the ocean; its breathing and increase and decrease of blood in the pulses the ebb and flood of the sea; and the heat of the spirit of the world is fire which pervades the earth, and the vital soul dwells in the fires which from various apertures of the earth issue in springs and sulphur minerals and volcanoes, as at Mount Etna in Sicily and in many other places.

Nothing is generated in a place where is no sentient vegetable and rational life; feathers grow on birds and change every year; coats grow on animals and are changed every year, with some exceptions, like the lion's beard and the cat's fur, and such; grass grows in the fields and leaves on the trees; and every year they are renewed in great part. Thus we can say that the spirit of growth is the soul of the earth, the soil its flesh, the ordered arrangement of rocks its bones, of which mountains are formed, the tufa its tendons; its blood the veins of water which surround its heart, which is the ocean; its breathing and increase and decrease of blood in the pulses the ebb and flood of the sea; and the heat of the spirit of the world is fire which pervades the earth, and the vital soul dwells in the fires which from various apertures of the earth issue in springs and sulphur minerals and volcanoes, as at Mount Etna in Sicily and in many other places.

Approximate author period: c. 1486 AD · medieval

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Attribution & collection notes
Author or tradition
Leonardo da Vinci
Attribution: attributed
Country attributed
Not established
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Historical period
Approximate author period: c. 1486 AD · medieval
author lifetime midpoint (1452–1519); not quotation composition date
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Recorded source
Thoughts on Art and Life (1906 English edition) (1906 AD)

Thoughts on Science, complete printed unit 51; Maurice Baring translation; Boston: The Merrymount Press,1906

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Leonardo da Vinci: Drawn portrait

Represented by the complete source-numbered selections in Thoughts on Art and Life, Maurice Baring’s1906English translation, edited by Lewis Einstein. The catalogue records1452–1519; the historical collection is a selection from notebooks, not a continuous book composed by Leonardo or independent authentication of every attributed passage.

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