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Just as iron rusts from disuse, and stagnant water putrefies, or when cold turns to ice, so our intellect wastes unless it is kept in use.
Leonardo da Vinci
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Leonardo da Vinci
Age: 67 †
Born: 1452
Born: April 15
Died: 1519
Died: May 2
Anatomist
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More quotes by Leonardo da Vinci
Not to punish evil is equivalent to authorizing it.
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To be a winner you must want to win but must know of the chance of losing and must not fear of it.
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You must grow in patience when you meet with great wrongs, and they will then be powerless to vex your mind.
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To discover the soul living in somebody's body, we watch the surrounding of the body, and if it's messy and disordered, so is the soul.
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The eye encompasses the beauty of the whole world.
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To speak ill of a good person is not truly good, all in all.
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In rivers, the water that you touch is the last of what has passed and the first of that which comes so with present time.
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Why are the bones of great fishes, and oysters and corals and various other shells and sea-snails, found on the high tops of mountains that border the sea, in the same way in which they are found in the depths of the sea?
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There is no result in nature without a cause understand the cause and you will have no need of the experiment.
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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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It is a far worthier thing to read by the light of experience than to adorn oneself with the labors of others.
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Everything comes from everything, and everything is made out of everything, and everything returns into everything.
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I would venture to affirm that a man cannot attain excellence if he satisfy the ignorant and not those of his own craft, and if he be not 'singular' or 'distant,' or whatever you like to call him.
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Happy will be those who give ear to the words of the dead: - The reading of good works and the observing of their precepts.
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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.
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Every now and then go away, have a little relaxation, for when you come back to your work your judgment will be surer.
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Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death.
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Therefore, O students, study mathematics and do not build without foundations.
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Obstacles cannot crush me. Every obstacle yields to stern resolve. He who is fixed to a star does not change his mind.
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To any white body receiving the light from the sun, or the air, the shadows will be of a bluish cast.
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