The Da Vinci Notebooks at sacred-texts.com
On Mount Etna the words freeze in your mouth and you may make ice of them.
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.
You do ill if you praise, and still worse if you reprove in a matter you do not understand.
When Fortune comes, seize her in front with a sure hand, because behind she is bald.
294:637 2: There is no clue to explain this strange sentence.