“The greatest deception men suffer is from their own opinions.”
Leonardo da Vinci
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“Reprove your friend in secret and praise him openly.”
— Leonardo da Vinci Primary source“Necessity is the mistress and guide of nature.”
— Leonardo da Vinci Primary sourceMore quotes by Leonardo da Vinci →
“Like all harsh, cold men, he was easily tipped over into sentiment.”
— Ian Fleming Primary source“Do not do that which you would not have known.”
— Benjamin Franklin Primary source“Observe all men; thyself most.”
— Benjamin Franklin Primary source“You may be too cunning for one, but not for all.”
— Benjamin Franklin Primary source