No one built this country on their own. This nation is great because we built it together.

Learning to stand in somebody else's shoes, to see through their eyes, that's how peace begins. And it's up to you to make that happen. Empathy is a quality of character that can change the world.

Physically, I feel probably as good as I've ever felt. And I've got as much energy as I ever did. But what you feel after eight years - and I think you'd feel this no matter what, but anytime you have a big transition, it gets magnified - is time passes.

It was young people who stubbornly insisted on justice, stubbornly refused to accept the world as it is that transformed not just the country but transformed the world.

I'm not going to Wall Street [after the presidency]. The amount of time that I'll be investing in issues is going to be high. But it'll be necessarily in a different capacity.

Reading makes all other learning possible. We have to get books into our children's hands early and often.

Nobody's madder than me about the website not working as well as it should, which means it's going to get fixed.