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Continue to ChatJust as iron which is not used grows rusty, and water putrefies and freezes in the cold, so the mind of which no use is made is spoilt. - Leonardo da Vinci from https://whatsmyquote.com/quote/just-as-iron-which-is-not-used-grows-rusty-and-water-putrefies-and-freezes-in-the-cold-so-the-mind-of-which-no