Get informed, not by reading The Huffington Post.

As the world's largest economy and second-largest carbon emitter, as a country with unsurpassed ability to drive innovation and scientific breakthroughs, as the country that people around the world continue to look to in times of crisis, we've got a vital role to play. We can't stand on the sidelines. We've got a unique responsibility.

I say that is because those are the times where sometimes you feel actually a little bit hurt. Because you feel like saying to these folks, "[Don't] you think if I could do it, I [would] have just done it. Do you think that the only problem is that I don't care enough about the plight of poor people, or gay people, or immigrants, or ...?"

I'm going to insist on making sure that we've got decent funding, that we've got enough teachers, that we've got computers in the classroom, but unless you turn off the television set and get over a certain anti-intellectualism that I think pervades some low-income communities, our children are not going to achieve.

Now is the time for all of us to take our share of responsibility for a global response to global challenges.

Throughout American history, there have been moments that call on us to meet the challenges of an uncertain world, and pay whatever price is required to secure our freedom.

Here at home, we will strengthen our defenses but not succumb to a siege mentality that sacrifices the open society and liberties and values that we cherish as Americans, because great and proud nations don't hunker down and hide behind walls of suspicion and mistrust.