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If you find from your own experience that something is a fact and it contradicts what some authority has written down, then you must abandon the authority and base your reasoning on your own findings.

Leonardo da Vinci

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Leonardo da Vinci
Age: 67 †
Born: 1452
Born: April 15
Died: 1519
Died: May 2
Anatomist
Architect
Astronomer
Botanist
Caricaturist
Chemist
Civil Engineer
Composer
Diplomat
Engineer
Inventor
Mathematician
Musician
Fact
Experience
Contradicts
Facts
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Find
Base
Must
Abandon
Something
Findings
Authority
Written

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Look at light and admire its beauty. Close your eyes, and then look again: what you saw is no longer there and what you will see later is not yet.
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The painter strives and competes with nature.
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Music... is the shaping of the invisible.
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The days are long enough for those who use them.
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Black is like a broken vessel, which is deprived of the capacity to contain anything.
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He who fears dangers will not perish by them.
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Lying on a feather mattress or quilt will not bring you renown.
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First study the science, and then practice the art which is born of that science.
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We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.
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Every obstacle is destroyed through rigor.
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If anyone wishes to see how the soul dwells in its body, let him observe how this body uses its daily habitation that is to say, if this is devoid of order and confused, the body will be kept in disorder and confusion by its soul.
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A long life is a life well spent.
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The painter has the Universe in his mind and hands.
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It's not enough that you believe what you see. You must also understand what you see.
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Common Sense is that which judges the things given to it by other senses.
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Art is never finished, only abandoned.
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Fire destroys all sophistry, that is deceit and maintains truth alone, that is gold.
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Envy wounds with false accusations, that is with detraction, a thing which scares virtue.
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Iron rusts from disuse water loses its purity from stagnation... even so does inaction sap the vigor of the mind.
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O Time! consumer of all things O envious age! thou dost destroy all things and devour all things with the relentless teeth of years, little by little in a slow death. Helen, when she looked in her mirror, seeing the withered wrinkles made in her face by old age, wept and wondered why she had twice been carried away.
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