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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“A lie stands on one leg, truth on two.”
— Benjamin Franklin Primary source“The only way to have a friend is to be one.”
— Ralph Waldo Emerson Primary source“You may be too cunning for one, but not for all.”
— Benjamin Franklin Primary source“This time, like all times, is a very good one, if we but know what to do with it.”
— Ralph Waldo Emerson Primary source