Leonardo da Vinci - Quotes and Sketches



“I ask which is swifter - a spark going upwards and living or turing downwards in death.”

“Define to me why one who slides on the ice does not fall.”

“You know the medicines when well used restore health to the sick: they will be well used when the doctor together with his understanding of their nature shall understand also what man is, what life is, and what constitution and health are. Know these well and you will know their opposites; and when this is the case you will know well how to devise a remedy.”

“Nothing is superfluous and nothing is lacking in any species of animal or product of nature unless the defect comes from the means which produce it.”

“The potencies are four: memory and intellect appetite and concupiscence. The two first are of the reason the others of the senses. Of the five senses, seeing, hearing, smelling may be partially with-held - touch and taste, not. the sense of smell leads that of taste with it, in the dog and other greedy animals.”

“Explain the earth with its longer and shorter day in the north and in the south, and do the same for the moon and define them accurately.”

“The earth wears away the mountains and fills up the valleys and if it had the power it would reduce the earth to a perfect sphere.”

“There is a spring in Sicily which as it rises at certain seasons of the year throws out chestnut leaves in large quantitites. Since however chestnut trees do not grow in Sicily this spring must have originally from some underground lake in Italy and then passed beneath the sea and afterward found outlet in Sicily.”







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