I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.
- Leonardo da Vinci, the “Renaissance Man” whose interests included: invention, painting, sculpting, architecture, science, music, mathematics, engineering, literature, anatomy, geology, astronomy, botany, writing, history, and cartography. The "Mona Lisa" and "The Last Supper," are among his most famous works. (1452-1519)