Pessimists are usually right and optimists are usually wrong but all the great changes have been accomplished by optimists.

In the hyperconnected world, there is only “good” “better” and “best.

I think the Arab awakening has changed everything and I think a lot will depend on what people there ask of us, may be nothing, it may be a lot. I think that really depends how they find their voice and what they see as their real interest, and hopefully that would be for more schools and not more tanks.

The hidden hand of the market will never work without a hidden fist -- McDonald's cannot flourish without McDonnell Douglas, the builder of the F-15. And the hidden fist that keeps the world safe for Silicon Valley's technologies is called the United States Army, Air Force, Navy and Marine Corps.

Rock stars get room keys, I get business cards.

In the future, how we educate our children may prove to be more important than how much we educate them.

We have to fight the terrorists as if there were no rules and preserve our open society as if there were no terrorists.