Nothing should be so greatly feared as empty fame.

The painter has the Universe in his mind and hands.

Obstacles cannot crush me. Every obstacle yields to stern resolve. He who is fixed to a star does not change his mind.

Let’s end the notion that ideas have no value unless they turn into a business or have some other practical use. Save them all in a beautiful book like Leonardo did. You might want to give them away someday, perhaps to someone who needs an idea. Or your great-great-grandchildren might love knowing what a fascinating mind you had. Or your biographer might be very happy after you’re gone.

The structural similarity of men, and their ability to be represented both as ideal, like Leonardo's Vitruvian Man, and as average. Man being the measure of all things, and therefore a sort of standard and interchangeable unit of length, breadth, intelligence, emotion. We could lay them end to end to measure the distance between the continents, the distance to the moon. We could use them to calculate the weight of weather, or to buy things at the grocery. With such an abundance of men, we could gauge anything we chose.

Don’t say you don’t have enough time or enough money to change the world. You have exactly the same number of hours per day that were given to Helen Keller, Gandhi, Michelangelo, Mother Teresa, Leonardo da Vinci and Jesus Christ.

The Maestro spoke again. "When we are not, at what point do we become?" I could not reply. For I had grasped no shape of his thoughts. I understood neither what he said nor his intent behind it.

That one of history’s greatest brains struggled with amo, amas, amat should be consolation to anyone who has ever tried to learn a second language.

She looked... She looked young, and- and--" I glanced down at Rossana gazing up at me, lips parted, eyes shining, her hair loose around her shoulders, and the next words I spoke were intended with no artifice at all. "She is almost as beautiful as you." There was laughter, and I looked up, confused. "If you wish to pay court to my daughter, Matteo, you must first speak to me," Captain dell'Orte said in mock severity. Rossana's face colored pink."Elizabetta is also very beautiful," I said quickly, thinking to cover any embarassment, but also because it was true. The adults roared with laughter. "Now Matteo seeks to woo both girls with one compliment.

Lying eats into the soul. If it becomes a habit it frays the edge of your spirit. Truth telling, although sometimes harder to do, strengthens your heart. It serves a person ill not to tell the truth.

One of the best examples of a polymath is Leonardo da Vinci. Born in Italy in 1452, Leonardo was a sculptor, painter, architect, mathematician, musician, engineer, inventor, anatomist, botanist, geologist, cartographer and writer. Although he received an informal education that included geometry, Latin and mathematics, he was essentially an autodidact, or a self-taught individual.

There is nothing in man or nature that does not ask questions.

He could quite quickly become detached from the nuances of common human emotion. Particularly if he was engaged in some aspect of a scientific problem or research. His work excluded any consideration for the feelings of those around him. And he rarely excused himself or justified his behavior. It was as if he was compelled to focus all his energy on one subject and was unaware that others did not follow his obsession.