"Necessity is the teacher and the guardian of nature. Necessity is the theme and inventor of nature as well as its restraint and eternal rule."      Quotes 1 l 2 l 3 l 4 l 5 l 6 l 7 l 8 l 9 l 10 l 11 l 12 l 13 l 14 l 15 l 16 l 17 l 18

Read about Leonardo's life and works at GreatItalians.com