“Just as iron rusts unless it is used, and water putrifies or, in cold, turns to ice, so our intellect spoils unless it is kept in use.”
Leonardo da Vinci (verified)
The Notebooks of Leonardo Da Vinci (Primary source)
The Notebooks of Leonardo da Vinci, translated by Jean Paul Richter, is a thematic anthology of Leonardo’s writings on art, science, anatomy, engineering, and philosophy—revealing the genius’s insights, observations, and inventions through his own reflective and analytical prose.
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“A man is worthy of praise or blame solely on account of those actions which lie within his power to do or not to do.”
— Leonardo da Vinci (verified)“Wisdom is the daughter of experience.”
— Leonardo da Vinci (verified)“To speak well of a base man is much the same as speaking ill of a good man.”
— Leonardo da Vinci (verified)“Necessity is the mistress and guide of nature.”
— Leonardo da Vinci (verified)More quotes by Leonardo da Vinci →
“It was a very Corsican wine and you could dilute it by half with water and still receive its message.”
— Ernest Hemingway (verified)“Books are the best of things, well used; abused, among the worst. What is the right use? What is the one end which all means go to effect? They are for nothing but to inspire.”
— Ralph Waldo Emerson (verified)“In skating over thin ice, our safety is in our speed.”
— Ralph Waldo Emerson (verified)“As a well-spent day brings happy sleep, so a life well used brings happy death.”
— Leonardo da Vinci (verified)