There is a word in South Africa - Ubuntu - that describes his greatest gift: his recognition that we are all bound together in ways that can be invisible to the eye; that there is a oneness to humanity; that we achieve ourselves by sharing ourselves with others, and caring for those around us.

We've been able to organize the international community around it in ways that aren't going to go back.

I've come to embrace the notion that I haven't done enough in my life. I've come to confirm that one's title, even a title like president of the United States, says very little about how well one's life has been led. No matter how much you've done or how successful you've been, there's always more to do, always more to learn, and always more to achieve.

But at a time when our discourse has become so sharply polarized - at a time when we are far too eager to lay the blame for all that ails the world at the feet of those who think differently than we do - it's important for us to pause for a moment and make sure that we are talking with each other in a way that heals, not a way that wounds.

I think Barack Obama 'll talk about the actions that we've taken, not just since 9/11, but since Paris, to help keep the American people and American interests safe.

Citizenship means standing up for the lives that gun violence steals from us each day. I have seen the courage of parents, students, pastors, and police officers all over this country who say 'we are not afraid,' and I intend to keep trying, with or without Congress, to help stop more tragedies from visiting innocent Americans in our movie theaters, shopping malls, or schools like Sandy Hook.

Let's say hypothetically, knowing what we know now about public policy, that we could close the education gap so that it was only a couple percentage points, and we could make sure that hiring barriers and educational barriers had been leveled down, and unemployment among African Americans right now instead of being double was only 10 percent higher than white unemployment - if we got to that point , America as a whole would be a lot richer.