The Mona Lisa, to me, is the greatest emotional painting ever done. The way the smile flickers makes it a work of both art and science, because Leonardo understood optics, and the muscles of the lips, and how light strikes the eye - all of it goes into making the Mona Lisa's smile so mysterious and elusive.

You should never start a company with the goal of getting rich. Your goal should be making something you believe in and making a company that will last. Excerpt From: Walter, Isaacson. “Steve Jobs.” Simon & Schuster, 2011-10-23T21:00:00+00:00. iBooks. This material may be protected by copyright.

The people who invented the twenty-first century were pot-smoking, sandal-wearing hippies from the West Coast like Steve, because they saw differently,” he said. "The hierarchical systems of the East Coast, England, Germany, and Japan do not encourage this different thinking. The sixties produced an anarchic mind-set that is great for imagining a world not yet in existence.

Jobs insisted that Apple focus on just two or three priorities at a time. “There is no one better at turning off the noise that is going on around him,” Cook said. “That allows him to focus on a few things and say no to many things. Few people are really good at that.

Ed Woolard, his mentor on the Apple board, pressed Jobs for more than two years to drop the interim in front of his CEO title. Not only was Jobs refusing to commit himself, but he was baffling everyone by taking only $1 a year in pay and no stock options. I make 50 cents for showing up, he liked to joke, and the other 50 cents is based on performance.

Leonardo da Vinci did not take received wisdom - whether from ancient classical thinkers or medieval scholars or from the Bible - without questioning it. And this was the beginning of the scientific method. This is another lesson for our time: that when we have evidence that contradicts a certain belief, we should be willing to change it. I think this made Leonardo, in some ways, a person who better understood the beauty of God's creation than a person who just takes all received wisdom from the Bible on faith.

The older I get, the more I see how much motivations matter. The Zune was crappy because the people at Microsoft don’t really love music or art the way we do. We won because we personally love music.