People of Berlin — and people of the world — the scale of our challenge is great. The road ahead will be long. But I come before you to say that we a… - Barack Obama

We are a people of improbable hope.

I learned to slip back and forth between my black and white worlds, understanding that each possessed its own language and customs and structures of meaning, convinced that with a bit of translation on my part the two worlds would eventually cohere.

What makes me cautiously optimistic about my successor and the shift from campaign mode to governance is there’s something about the solemn responsibilities of that office, the extraordinary demands that are placed on the United States -- not just by its own people but by people around the world -- that forces you to focus, that demands seriousness. And if you’re not serious about the job, then you probably won’t be there very long because it will expose problems. Even when you’re doing a job, even when you are attentive, there are so many things that come across your desk that people are going to question you, and you’re going to have opponents and you’re going to have critics, and you figure that out pretty fast when you’re sitting there. And I think the President-elect is going to see fairly quickly that the demands and responsibilities of a U.S. President are not ones that you can treat casually, and that in a big, complex, diverse country, the only way that you can be successful is by listening and reaching out and working with a wide variety of people.

For all of our differences, the Cuban and American people share common values in their own lives. A sense of patriotism and a sense of pride -- a lot of pride. A profound love of family. A passion for our children, a commitment to their education. And that's why I believe our grandchildren will look back on this period of isolation as an aberration, as just one chapter in a longer story of family and of friendship. But we cannot, and should not, ignore the very real differences that we have -- about how we organize our governments, our economies, and our societies. Cuba has a one-party system; the United States is a multi-party democracy. Cuba has a socialist economic model; the United States is an open market. Cuba has emphasized the role and rights of the state; the United States is founded upon the rights of the individual.