And in my own life, in my own small way, I've tried to give back to this country that has given me so much. That's why I left a job at a law firm for a career in public service, working to empower young people to volunteer in their communities. Because I believe that each of us — no matter what our age or background or walk of life — each of us has something to contribute to the life of this nation.

People like Hillary Clinton, who put those 18 million cracks in the glass ceiling, so that our daughters — and sons — can dream a little bigger and aim a little higher. People like Joe Biden, who's never forgotten where he came from and never stopped fighting for folks who work long hours and face long odds and need someone on their side again.

And as our friendship grew, and I learned more about Barack, he introduced me to the work he'd done when he first moved to Chicago after college. Instead of heading to Wall Street, Barack had gone to work in neighborhoods devastated when steel plants shut down and jobs dried up. And he'd been invited back to speak to people from those neighborhoods about how to rebuild their community.

And Barack and I set out to build lives guided by these values, and pass them on to the next generation. Because we want our children — and all children in this nation — to know that the only limit to the height of your achievements is the reach of your dreams and your willingness to work for them.

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And you know, what struck me when I first met Barack was that even though he had this funny name, even though he'd grown up all the way across the continent in Hawaii, his family was so much like mine. He was raised by grandparents who were working-class folks just like my parents, and by a single mother who struggled to pay the bills just like we did. Like my family, they scrimped and saved so that he could have opportunities they never had themselves. And Barack and I were raised with so many of the same values: that you work hard for what you want in life; that your word is your bond and you do what you say you're going to do; that you treat people with dignity and respect, even if you don't know them, and even if you don't agree with them.

My dad was our rock. Although he was diagnosed with multiple sclerosis in his early 30s, he was our provider, our champion, our hero. As he got sicker, it got harder for him to walk, it took him longer to get dressed in the morning. But if he was in pain, he never let on. He never stopped smiling and laughing — even while struggling to button his shirt, even while using two canes to get himself across the room to give my mom a kiss. He just woke up a little earlier and worked a little harder.

I come here tonight as a sister, blessed with a brother who is my mentor, my protector and my lifelong friend. I come here as a wife who loves my husband and believes he will be an extraordinary president. I come here as a mom whose girls are the heart of my heart and the center of my world — they're the first thing I think about when I wake up in the morning, and the last thing I think about when I go to bed at night. Their future — and all our children's future — is my stake in this election.

I can't tell you how much it means to have Craig and my mom here tonight. Like Craig, I can feel my dad looking down on us, just as I've felt his presence in every grace-filled moment of my life. At 6-foot-6, I've often felt like Craig was looking down on me too … literally. But the truth is, both when we were kids and today, he wasn't looking down on me. He was watching over me.

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Are we ready to believe in the power of our own voices? Are we ready to cast aside our fear and cynicism? Are we ready to work our hearts out to make our dream a reality? Are we ready to overcome? If we are truly ready, then now is the time. This one’s on us. We cannot afford to wait. We cannot afford to doubt. We cannot afford to make excuses. We have this moment of opportunity. And we need to seize it.

We’re going to have to dig deep into our souls, confront our own self-doubt, and recognize that our destiny is in our hands – that our future is what we make of it. So let’s build the future we all know is possible. Let’s prove to our children that they really can reach for their dreams.

Barack believes in the greatness of America. He’s seen it in his own life’s journey. But he also knows that what’s holding us back is that our leaders have lost touch with the ideals that make this country great. Ideals like equality. Justice. Freedom from want and despair. And he believes that until we restore a sense of common destiny and shared purpose; until we understand that we are only as strong as the weakest among us; that there is more that binds us together than drives us apart; until we see ourselves in one another – until we truly care for all children; not just our own then we will continue to struggle with the problems that plague us.

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So these were the voices I was hearing growing up. And they gave me the strength and courage to overcome the doubt and fear I was hearing in other corners of my community. From classmates who thought a black girl with a book was acting white. From teachers who told me not to reach too high because my test scores were too low. And from well-meaning but misguided folks who said, “no, you can’t,” “you’re not smart enough,” and “you’re not ready.” Who said “success isn’t meant for little black girls from the South Side of Chicago.” And you know what? When I listened to my own voice and cast the cynics aside, when I forged ahead and overcame the doubts and fears of others about who I was and what I could become, I found that their doubts and fears were misplaced. Funny thing, the more I achieved, the more I found that I was just as ready, just as qualified, just as capable as those who felt entitled to the seat at the table that I was working so hard for. And I realized that those who had been given the mantle of power in this country didn’t have any magic about them. They were no better, no smarter than me. That gnawing sense of self-doubt that is common within all of us is a lie. It’s just in our heads. Nine times out of ten, we are more ready and more prepared than we could ever know.