I'm not a macroeconomics person.

Vision without execution is daydreaming.

Sometimes we do get taken by surprise. For example, when the Internet came along, we had it as a fifth or sixth priority.

The world is not flat, and PCs are not, in the hierarchy of human needs, in the first five rungs.

I've been studying how quickly we can get energy out to the poor countries - a lot of which are in Africa - and how little progress we've made there. There's no more electricity today in sub-Saharan Africa per person than there was 20 years ago.

If you have 50 different plug types, appliances wouldn't be available and would be very expensive. But once an electric outlet becomes standardized, many companies can design appliances, and competition ensues, creating variety and better prices for consumers.

Your most unhappy customers are your greatest source of learning.