"To make a perfume, take some rose water and wash your hands in it, then take a lavender flower and rub it with your palms, and you will achieve the desired effect"
"Just as iron rusts from disuse, and stagnant water putrefies, or when cold turns to ice, so our intellect wastes unless it is kept in use."
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Source: Leonardo da Vinci (2008). “Notebooks”, p.246, OUP Oxford
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