When you're really trying to make serious change, you don't want people to get caught up in emotion because change isn't emotion. Because change isn't emotion. Its real work and organization and strategy - that's just the truth of it. I mean, you pull people in with inspiration, but then you have to roll up your sleeves and you've got to make sacrifices and you have got to have structure.

Choose people who lift you up.

I've always tried to make sure that what I do really connects with the broader agenda of what my husband Barack Obama is trying to do.... But I also find that I have to be very passionate myself about the issue to be able to represent it well. One of the big issues that I've talked a lot about...is childhood health, nutrition and obesity.

I know what it feels like to struggle to get the education that you need.

You may not always have a comfortable life and you will not always be able to solve all of the world's problems at once but don't ever underestimate the importance you can have because history has shown us that courage can be contagious and hope can take on a life of its own.

Selfishly, working with kids gives me joy - it makes me feel like my life has a purpose. And I thought, Imagine what we can do in the White House, particularly with the kids in the D.C. area, many of whom have never set foot on the White House lawn.

The president's job is a lot harder. And that's why I'm working hard to get him re-elected, because he's handled himself with a level of grace and poise that not many people could given the challenges that he's faced.