History is just littered with problems that were solved that were supposed to be impossible.

I have always had a tendency to keep enlarging problems which I personally think is the way the world works... that seeing anything one dimensionally on the kinds of political, sort of big issues of human progress is going to be a distorted view of things, which is why over my career I have gone seemingly from subject to subject to subject.

I think one has to say it's not just simply a matter of capturing people and holding them accountable, but removing the sanctuaries, removing the support systems, ending states who sponsor terrorism. And that's why it has to be a broad and sustained campaign.

We just did what we'd done when we were an act in the '60s. But I found it impossible to hold a dialogue with 500,000 people. In a certain sense, it was numbing.

People are not problems to be solved. They are mysteries to be explored.

Public action should seek to expand the set of opportunities of those who have the least voice and fewest resources and capabilities.