For that is the true genius of America - that America can change.

o futuro, por obama:

I know you didn’t do this just to win an election and I know you didn’t do it for me. You did it because you understand the enormity of the task that lies ahead. For even as we celebrate tonight, we know the challenges that tomorrow will bring are the greatest of our lifetime -– two wars, a planet in peril, the worst financial crisis in a century.
The road ahead will be long. Our climb will be steep. We may not get there in one year or even one term, but America –- I have never been more hopeful than I am tonight that we will get there. I promise you –- we as a people will get there.
There will be setbacks and false starts. There are many who won’t agree with every decision or policy I make as president, and we know that government can’t solve every problem. But I will always be honest with you about the challenges we face.

e o believe (yes we can!) de mccain:

I wish godspeed to the man who was my former opponent and will be my president. And I call on all Americans, as I have often in this campaign, to not despair of our present difficulties, but to believe, always, in the promise and greatness of America, because nothing is inevitable here.