Since taking office, I've made it clear that the United States was prepared to begin a new chapter of engagement with the Islamic Republic of Iran. We offered the Iranian government a clear choice. It could fulfill its international obligations and realize greater security, deeper economic and political integration with the world, and a better future for all Iranians. Or it could continue to flout its responsibilities and face even more pressure and isolation.

Part of American leadership is making sure that we're doing nation building here at home. That will help us maintain the kind of American leadership that we need.

That is another theme in the book [Dreams from My Father]. How do we exercise more empathy in our public discourse? How do we get the black to see through the eyes of the white? Or the citizen to see through the eyes of the immigrant? Or the straight to see through the eyes of the gay? That has always been a struggle in our politics.

I am a Christian. So, I have a deep faith. So I draw from the Christian faith...So, I'm rooted in the Christian tradition. I believe that there are many paths to the same place.

When the United States stands up for human rights, by example at home and by effort abroad, we align ourselves with men and women around the world who struggle for the right to speak their minds, to choose their leaders, and to be treated with dignity and respect. We also strengthen our security and well being, because the abuse of human rights can feed many of the global dangers that we confront - from armed conflict and humanitarian crises, to corruption and the spread of ideologies that promote hatred and violence.

If I'm president, some day, young kids will look at the world differently. They will say, I could be president some day. They couldn't have said that before I came along. The world will see the United States in a different context, as a country of true opportunity for all.

Become a teacher. Your country needs you.