I think that society has to be careful not to shift all of its resources to the elderly versus the young.

I don't think there's anything unique about human intelligence.

The general idea of the rich helping the poor, I think, is important.

If you think your teacher is tough, wait till you get a boss.

Business is a good game. Lots of competition and a minimum of rules. You keep score with money.

I do the dishes every night -- other people volunteer, but I like the way I do it.

Energy is actually harder; it takes more time to get a product, but if you do it's a very, very big market and the constraints of doing that in a clean way are more obvious all the time.

In terms of mathematics textbooks, why can't you have the scale of a national market? Right now, we have a Texas textbook that's different from a California textbook that's different from a Massachusetts textbook. That's very expensive.

Bitcoin is a technological tour de force.

Television is not real life. In real life people actually have to leave the coffee shop and go to jobs.

Digital technology has several features that can make it much easier for teachers to pay special attention to all their students.

At Microsoft there are lots of brilliant ideas but the image is that they all come from the top -- I'm afraid that's not quite right.

People always fear change. People feared electricity when it was invented, didn't they?

Humanity's greatest advances are not in its discoveries -- but in how those discoveries are applied to reduce inequity.

The only role other than paying their taxes, whatever those are, the only role for philanthropy broadly -- of which the rich should give disproportionately -- the more, the better -- and I think there is a positive trend in that direction -- there are certain risk-taking things, like trying out a new type of charter school or funding a new kind of medicine.

If you say to people that there's less violence today than in the past, they would be stunned to hear that. But it's the truth, even though we have awful things happening in Syria or Sudan.

I'm quite worried about the fiscal imbalances that we've got and what that might mean in terms of financial crisis ahead.

As we get robots becoming more sophisticated, I think we should worry sooner rather than later on how much they could take over, but I think it'll mostly be a positive thing. In terms of deadlines it won't be any worse than nuclear weapons.

It is hard to overstate how valuable it is to have all the incredible tools that are used for human disease to study plants.

My success, part of it certainly, is that I have focused in on a few things.