That is the American story. People, just like you, following their passions, determined to meet the times on their own terms. They weren't doing it for the money. Their titles weren't fancy. But they changed the course of history and so can you.

America, we weaken our ties when we allow our political dialogue to become so corrosive that people of good character aren't even willing to enter into public service; so coarse with rancor that Americans with whom we disagree are seen not just as misguided but as malevolent. We weaken those ties when we define some of us as more American than others, when we write off the whole system as inevitably corrupt, and when we sit back and blame the leaders we elect without examining our own role in electing them.

Rand`s [Paul] a libertarian. He has a view of the world that I don`t share. He said that we shouldn`t have any troops in Iraq. He agreed with Obama that was a disaster. When there was a chance to do something constructive about Syria with a no-fly zone, he said we don`t need one.

I just want to repeat that there's nothing that we've proposed that would make it harder for you to purchase a firearm.

If the people cannot trust their government to do the job for which it exists - to protect them and to promote their common welfare - all else is lost.

And to those nations like ours that enjoy relative plenty, we say we can no longer afford indifference to the suffering outside our borders; nor can we consume the world's resources without regard to effect. For the world has changed, and we must change with it.

I think that there have been a number of public figures where you start hearing commentary that is dangerous because what it starts doing is it starts dividing us up as Americans.