Leonardo da Vinci (1452-1519) da Vinci, Leonardo, an Italian Renaissance painter, scientist, and symbol of human wisdom. His famous sayings are as follows: 1. A day of hard work , you can get a long sleep; if you work hard all your life, you can get a happy sleep. 2. Ah! Poor people in the world, open your eyes! 3. An egg can be painted countless times, but can a love? 4. Birds There are no bats outside the species 5. Iron will rust if not used, water will stink if it is not flowing, and human wisdom will wither if not used