Never give up on your dreams.

If you can look back and say, "The economy's better. Our security's better. The environment's better. Our kids' education is better," if you can say that you've made things better, then considering all the challenges out there, you should feel good. But I'm the first to acknowledge that I did not crack the code in terms of reducing this partisan fever.

In the campaign back in 2007, 2008, people would say, "Oh, he's being naïve. He thinks that there's no red states and blue states. And wait 'til he gets here." And I will confess that, I didn't fully appreciate the ways in which individual senators or members of Congress now are pushed to the extremes by their voter bases. I did not expect, particularly in the midst of crisis, just how severe that partisanship would be.

In our household, the Bible, the Koran and the Bhagavad Gita sat on the shelf alongside books of Greek and Norse and African mythology

It is our generation's task, then, to reignite the true engine of America's economic growth - a rising, thriving middle class.

I didn't become a Christian until many years later, when I moved to the South Side of Chicago after college. It happened not because of indoctrination or a sudden revelation, but because I spent month after month working with church folks who simply wanted to help neighbors who were down on their luck no matter what they looked like, or where they came from, or who they prayed to. It was on those streets, in those neighborhoods, that I first heard God's spirit beckon me. It was there that I felt called to a higher purpose - His purpose.

I always say that campaigning and governing are two different things.