An expert is someone who articulates the needs of those in power.

People think responsibility is hard to bear. It's not. I think that sometimes it is the absence of responsibility that is harder to bear. You have a great feeling of impotence.

There is no realism without an element of idealism.

I believe that there is a whole set of issues in the world - environment, proliferation, energy, cyberspace - that can only be dealt with on a global basis. The traditional patterns of national rivalry and national competition are not suitable for those cases.

American politics are normally a result of pragmatic and not philosophical reasoning. No one in Washington has said we now prefer multilateralism.

I do not criticize people who take a public stand on human rights issues. I express my respect for them. But some people are more influential without a public confrontation.

Obama is like a chess player who is playing simultaneous chess and has opened his game with an unusual opening.