There is a mystique about psychiatry that people think that you have some kind of a magical lens, you know, Superman's X-ray vision into the soul. One of the reasons I left psychiatry is that I didn't believe that.

Life and consciousness are the two great mysteries. Actually, their substrates are the inanimate. And how do you get from neurons shooting around in the brain to the thought that pops up in your head and mine? There's something deeply mysterious about that. And if you're not struck by the mystery, I think you haven't thought about it.

The liberal vision of America is that it should be less arrogant, less unilateral, more internationalist. In Obama's view, America would subsume itself under a fuzzy internationalism in which the international community, which I think is a fiction, governs itself through the U.N.

I think if you're going to master policy, especially world affairs, you've got to know history.

To understand the workings of American politics, you have to understand this fundamental law: Conservatives think liberals are stupid. Liberals think conservatives are evil.

Some will protest that in a world with so much human suffering, it is something between eccentric and obscene to mourn a dog. I think not. After all, it is perfectly normal—indeed, deeply human—to be moved when nature presents us with a vision of great beauty. Should we not be moved when it produces a vision—a creature—of the purest sweetness?

I think the editorial page of the Washington Post is the best in the country. I think the editorials - considering it's a liberal town, liberal constituency and from the liberal tradition - I think it's the best editorial page around. It's quite balanced.

I don't think you can pump carbon dioxide into the atmosphere indefinitely and not have a reaction. But there are great scientists such as Freeman Dyson, one of the greatest physicists of the last hundred years, who has studied the question, who believes quite the opposite. The reason transnational action is so difficult is because the major problem with climate change is, A, that there is no consensus, and, B, that the economic cost is simply staggering. Reversing it completely might mean undoing the modern industrial economy.