1. "Authors. Even the sane one are nuts. - Da Vinci Code"
- Quote by Dan Brown
3. "Leonardo da Vinci pointed out that "simplicity is the ultimate sophistication."
- Tal Ben-Shahar, Happier: Learn the Secrets to Daily Joy and Lasting Fulfillment
7. "Where the spirit does not work with the hand there is no art. —Leonardo Da Vinci"
- Dan Miller, 48 Days to the Work You Love: Preparing for the New Normal