Americans believe that you can alter people by conversion, and that everybody in the world is a potential American. The Chinese also believe that their values are universal, but they do not believe that you can convert to becoming a Chinese unless you are born into it.

Don't be too ambitious. Do the most important thing you can think of doing every year and then your career will take care of itself.

I believe it is a mistake to isolate arms control from other areas of policy.

Now we have a whole series of problems - energy, environment, proliferation - which go beyond the nation. And we also know that a conflict between major powers would be a catastrophe for which there is no compensation in anything you can gain.

If the six-nation forums dealing with Iran and North Korea suffer comparable failures, the consequence will be a world of unchecked proliferation, not controlled by either governing principles or functioning institutions. A modern, strong, peaceful Iran could become a pillar of stability and progress in the region. This cannot happen unless Iran's leaders decide whether they are representing a cause or a nation - whether their basic motivation is crusading or international cooperation. The goal of the diplomacy of the Six should be to oblige Iran to confront this choice.

The problem is Russia is a country that has lost 300 years of its history, in terms of most of what was part of the Russian Empire in Europe, towards Europe, since Peter the Great, has been the territory that is no longer under Russian rule.

The history of things that didn't happen has never been written.