Saying the Tech Bloom is not commercially driven is like saying Mother Teresa had an interest in the poor.

Copenhagen has done a remarkable job creating streets that are focused on bicycles and pedestrians.

I think there's a gigantic generation gap in terms of how people understand the Internet and how much they think technology is an important factor in social change.

Optimism is a political act. Those who benefit from the status quo are perfectly happy for us to think nothing is going to get any better. In fact, these days, cynicism is obedience.

Urban retrofitting: creating different sorts of spaces and uses out of places that are already there.

If mass media, social isolation in the suburbs, alienating workplaces and long car commutes create a bunker mentality, the Internet does the opposite.

By looking at climate change as a clean energy generation problem, we're setting ourselves up not to solve it.

It's not just enough to survive. We've got to make something better than what we've got.

The denser places get, the lower the amount of energy people use to get around it.

We have to craft new political realities, not only in places like India, Afghanistan, Kenya, Pakistan, but here at home as well. Another world is possible.

Cabbies in particular seem to like discussing the fate the Earth.

Pride and folly, they go together like two tightly grasping hands.

Men are born to sin…What does matter most, is not that we err, it is that we do benefit from our mistakes, that we are capable of sincere repentance, of genuine contrition.

When more and more people are thrown out of work, unemployment results.

"... he had understood, better than anyone ... the beauty that grew out of the simple knowledge that everything, no matter how small or large it might be, was a perfect example of what it was."

God help England if she had no Scots to think for her.

Economic progress and justice do not consist in superbly equalized destitution, but in the constant creation of more and more goods and services, of more and more wealth and income to be shared.

I don't like junk food, just because I don't like the taste of it, but I don't go to the gym - ever.

There are worse things than poverty, though I can't for the moment remember what they are.

This message (that attempting to beat the market is futile) can never be sold on Wall Street because it is in effect telling stock analysts to drop dead.

I can be pretty persuasive if I believe in something strongly enough.