Child hunger and child obesity are really just two sides of the same coin. Both rob our children of the energy, the strength and the stamina they need to succeed in school and in life. And that, in turn, robs our country of so much of their promise.

The work-life balance is a harsh reality for so many women, who are forced every day to make impossible choices. Do they take their kids to the doctor...and risk getting fired? Do they work weekends so they can afford to send their kids to better childcare...even though it means even less time with their families? Do they take another shift at work, so they can pay for piano lessons for their kids...even though it means they have to stop volunteering for the PTA? It just shouldn't be this difficult to raise healthy families.

I come here tonight as a sister, blessed with a brother who is my mentor, my protector and my lifelong friend. And I come here as a wife who loves my husband and believes he will be an extraordinary president.

We learned about gratitude and humility - that so many people had a hand in our success, from the teachers who inspired us to the janitors who kept our school clean... and we were taught to value everyone's contribution and treat everyone with respect.

Treat people with dignity and respect.

That's the advice I would give to women: Don't look at the bankbook or the title. Look at the heart. Look at the soul. Look at how the guy treats his mother and what he says about women. How he acts with children he doesn't know. And, more important, how does he treat you? When you're dating a man, you should always feel good. You should never feel less than. You should never doubt yourself.

In fact, in the last job I had before coming to the White House - I remember this clearly - I was on maternity leave with Sasha, still trying to figure out what to do with my life, and I got a call for an interview for this position, a senior position at the hospitals. And I thought, okay, here we go. So I had to scramble to look for babysitting, and couldn't find one.