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Cornelius Celsus: Knowledge is the supreme good, the supreme evil is physical pain. We are composed of two separate parts, the soul and the the body; the soul is the greater of these two, the body the lesser. Knowledge appertains to the greater part, the supreme evil belongs to the lesser and baser part. Knowledge is an excellent thing for the mind, and pain is the most grievous thing for the body. Just as the supreme evil is physical pain, so is wisdom the supreme good of the soul, that is to say of the wise man, and no other thing can be compared with it.

Cornelius Celsus: Knowledge is the supreme good, the supreme evil is physical pain. We are composed of two separate parts, the soul and the the body; the soul is the greater of these two, the body the lesser. Knowledge appertains to the greater part, the supreme evil belongs to the lesser and baser part. Knowledge is an excellent thing for the mind, and pain is the most grievous thing for the body. Just as the supreme evil is physical pain, so is wisdom the supreme good of the soul, that is to say of the wise man, and no other thing can be compared with it.

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
A country attribution does not establish the earliest origin.
Historical period
Approximate author period: c. 1486 AD · medieval
author lifetime midpoint (1452–1519); not quotation composition date
An author lifetime, approximate period or collection date is not necessarily the date when these words were first written or spoken.
Recorded source
Thoughts on Art and Life (1906 English edition) (1906 AD)

Thoughts on Life, complete printed unit 14; 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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