“All our knowledge has its origin in our perceptions.”
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“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 Primary source“Truth was the only daughter of Time.”
— Leonardo da Vinci Primary sourceMore quotes by Leonardo da Vinci →
“You may be too cunning for one, but not for all.”
— Benjamin Franklin Primary source“Approve not of him that commends all you say.”
— Benjamin Franklin Primary source“Where there is shouting, there is no true knowledge.”
— Leonardo da Vinci Disputed“You may delay, but time will not.”
— Benjamin Franklin Primary sourceKnowledge Perception Senses Experience