I have been impressed with the urgency of doing; knowing is ... - Leonardo da Vinci

"I have been impressed with the urgency of doing; knowing is not enough, we must apply."

Leonardo da Vinci

Polymath Artist Scientist Italian 1452–1519

More from Leonardo da Vinci

"Learning never exhausts the mind."

"Simplicity is the ultimate sophistication."

"The observer sees what he observes."

"Art is the queen of all sciences."