There's no doubt that I'm a better president now than when I first took office. This is not a job where there's a manual, and over time you get a better sense of what's important, what's not, how to see around corners and anticipate problems, as opposed to just managing problems once they've arrived.

We have not confronted forcefully enough the intolerance, sectarianism, and hopelessness that feeds violent extremism in too many parts of the globe.

I'm not the strapping young Muslim socialist that I used to be.

Peace is not merely the absence of visible conflict.

Our alliance with our NATO partners has been a cornerstone of U.S. foreign policy for nearly 70 years, in good times and in bad and through presidents of both parties because the United States has a fundamental interest in Europe's stability and security.

Without a deal [with Iran], the international sanctions regime will unravel with little ability to reimpose them. With this deal, we have the possibility of peacefully resolving a major threat to regional and international security. Without a deal, we risk even more war in the Middle East and other countries in the region would feel compelled to pursue their own nuclear programs, threatening a nuclear arms race in the most volatile region in the world.

I can no more disown (Jeremiah Wright) than I can disown the black community. I can no more disown him than I can my white grandmother - a woman who helped raise me, a woman who sacrificed again and again for me, a woman who loves me as much as she loves anything in this world, but a woman who once confessed her fear of black men who passed by her on the street, and who on more than one occasion has uttered racial or ethnic stereotypes that made me cringe.