"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"
"Those who condemn the supreme certainty of mathematics feed on confusion, and can never silence the contradictions of the sophistical sciences which lead to eternal quackery."
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Source: Leonardo (da Vinci), Irma A. Richter, Thereza Wells (2008). “Notebooks”, p.9, Oxford University Press
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