Anyone who conducts an argument by appealing to authority is... - Leonardo da Vinci

"Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory."

Leonardo da Vinci Wisdom

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."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."