We know that someone who has channeled his anger into something constructive has not had a cow. How do we know these things?

One of the things cognitive science teaches us is that when people define their very identity by a worldview, or a narrative, or a mode of thought, they are unlikely to change-for the simple reason that it is physically part of their brain, and so many other aspects of their brain structure would also have to change; that change is highly unlikely.

Metaphor is pervasive in everyday life, not just in language but in thought and action. Our ordinary conceptual system, in terms of which we both think and act, is fundamentally metaphorical in nature.

The essence of metaphor is understanding and experiencing one kind of thing in terms of another.

We now know, from the latest research about neurons, that we are hard-wired for empathy. We're hard-wired for cooperation. That is something about what we are as people - what it means to be a human being. And what Barack Obama was addressing was not just race or just the nature of politics. The great speeches address who we are as people, what it means to be a human being.

Do we really think that the United States will have the protection of innocent Afghans in mind if it rains terror down on the Afghan infrastructure? We are supposedly fighting them because they immorally killed innocent civilians. That made them evil. If we do the same, are we any less immoral?

You see Bill Clinton, and you say: Oh, this guy cares about me. Hillary Clinton isn't the same way. You see her, and you don't necessarily have that view. She's trying to achieve the same thing without the voice and the body language, and she's having a harder time doing it. But when she's effective, that's what she's effective at.