And I come here as a daughter, raised on the South Side of Chicago - by a father who was a blue-collar city worker and a mother who stayed at home with my brother and me.

My children are very blessed.... That's why I think that mentoring is such a critical part of the role I can play in this position. I see how little bits of exposure and big bits of exposure really change my girls significantly, and I want that for more girls around the country and the world.

The arts and humanities define who we are as a people. That is their power -- to remind us of what we each have to offer, and what we all have in common. To help us understand our history and imagine our future. To give us hope in the moments of struggle and to bring us together when nothing else will.

I think the most moving part of my trip [to Africa] so far was seeing 92-year-old Nelson Mandela, and just thinking about his life. This man has lived through a struggle that few nations have known.

We've got a responsibility to live up to the legacy of those who came before us by doing all that we can to help those who come after us.

We have had with Barack Obama some just amazing experiences traveling abroad, being able to introduce our children to the world.... I'm also humbled by the response and the receptiveness, not just here in America, but around the world. There's a part of that warmth and enthusiasm and hope that is surprising and humbling.

I don't, as my mom would say, sweat the small stuff in our relationship. Because when I think of day-to-day irritations that you might have with the one you love, they're nothing compared to the bigger task at hand.