Of course, there is no question that Libya - and the world - will be better off with Gaddafi out of power. I, along with many other world leaders, have embraced that goal, and will actively pursue it through non-military means. But broadening our military mission to include regime change would be a mistake.

My father's voice had nevertheless remained untainted, inspiring, rebuking, granting or withholding approval. 'You do not work hard enough, Barry. You must help in your people's struggle. Wake up, black man!

I am confident that Assad's days are numbered. But what we can't do is to simply suggest that, as Governor Romney at times has suggested, that giving heavy weapons, for example, to the Syrian opposition is a simple proposition that would lead us to be safer over the long term.

What I'm thinking about are the millions of people, many of whom write me very personal letters :"Dear Mr. President: I did not vote for you. I was against Obamacare. And then my son who didn't have health insurance signed up and we just found out that he had an illness. And thankfully he's now covered, otherwise he might not have gotten treatment and I might have lost my house."

Nothing can stand in the way of the power of millions of voices calling for change.

If we truly believe in our public schools, then we have a moral responsibility to do better - to break the either-or mentality around school reform, and embrace a both-and mentality. Good schools will require both the structural reform and the resources necessary to prepare our kids for the future.

By so many measures, our country is stronger and more prosperous than it was when we first got here. And I'm hopeful we'll build on the progress we've made in the years to come.