When times get tough, we don't give up. We get up.

What makes [cyber security] difficult is because it's not just a government problem. It is a private sector and government problem. And there's gotta be a lot more cooperation.

What we have to do is make sure that here in America, if you work hard, you can get ahead. If you worked hard, not only did you have a good job, but you also had decent benefits, decent health care. We've got to make sure that we're doing everything we can to expand the middle class and people who are working hard can get into the middle class.

We may disagree about gay marriage, but surely we can agree that it is unconscionable to target gays and lesbians for who they are - whether it's here in the United States or, as Hillary (Clinton) mentioned, more extremely in odious laws that are being proposed most recently in Uganda.

We, the people, still believe that our obligations as Americans are not just to ourselves, but to all posterity.

One of the things you learn as president is, as powerful as this office is, you have limited bandwidth. And the time goes by really quickly and you're constantly making choices, and there are pressures on you from all different directions - pressures on your attention, not just pressures from different constituencies. And so you have to be pretty focused about where can you have the biggest, quickest impact.

We were very effective, and I was very effective, in shaping public opinion around my campaigns. But there were big stretches, while governing, where even though we were doing the right thing, we weren't able to mobilize public opinion firmly enough behind us to weaken the resolve of the Republicans to stop opposing us or to cooperate with us. And there were times during my presidency where I lost the PR battle.