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 Primary source“Wisdom is the daughter of experience.”
— Leonardo da Vinci Primary source“Any one who in discussion relies upon authority uses, not his understanding, but rather his memory.”
— Leonardo da Vinci Primary source“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.”
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“Nothing is troublesome that we do willingly.”
— Thomas Jefferson Primary source“Nothing in life is so exhilarating as to be shot at without result.”
— Winston Churchill Primary source“Without ambition one starts nothing. Without work one finishes nothing. The prize will not be sent to you. You have to win it.”
— Ralph Waldo Emerson Disputed“Nothing great was ever achieved without enthusiasm.”
— Ralph Waldo Emerson Primary source