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 and I love understanding American Revolution, but let's also understand the digital revolution, because that makes us more comfortable with our technology.

I think right now we need to look back at the founding values of our country. Rise above partisanship, be less bitter when it comes to important matters that have to be solved.

One of the strongest motives that leads men to art and science is escape from everyday life with its painful crudity and hopeless dreariness. Such men make this cosmos and its construction the pivot of their emotional life, in order to find the peace and security which they cannot find in the narrow whirlpool of personal experience.

Without Steve Jobs, you would have well-designed computers, probably open and not integrated, but they wouldn't have sex appeal, they wouldn't have romance.

Smart people are a dime a dozen. What matters is the ability to think different... to think out of the box.

Terrorism is a horrible thing that is the great threat to civilization on our planet.